Actually, from personal experience, these numbers do not surprise me at all. If we took into account all of the older games as well, I think you would find that France would be much higher, since occupation during the spring did not have to be maintained during the autumn to claim an SC, so France could claim both Spain and Portugal with one army/fleet.
I am personally very afraid of a successful Turkish player. If you have ever gone against one, which I have done all too many times, they are incredibly hard to stop once they go on their rampage. Besides the Lepanto, it is very hard to destroy the Sultan early game, because of his highly defensible position. I start to quiver in fear as soon as I see a game where someone has allowed Turkey to pick up two builds in the first year. Mostly, Turkey wins by terrestrial domination, painting Russia and Austria yellow. Taking Austria and the Balkans is easily done with the help of any other one of the multitude of countries surrounding Austria. After that, Russia is taken quite easily, and from that highly defensible position, Turkey rarely loses. With an annoying chokepoint to the north at StP, to the west at Tri-Tyr-Ven, and the stalemate line to the northwest, as well as an easily defensible Mediterranean position, the Turkish player can capitalize on a fractured alliance between England, France, Italy, and Germany. Only a strong France with England and Germany out of the way can possibly hope to defeat the Turk with the help of the Italian. If France or England are alive, they might feel bottled in, and it would take discipline to co-ordinate an offensive.
For all those who have yet to see a Lepanto, I personally, have seen quite a few in my games. In fact, in all my Italian wins, I have executed some sort of Lepanto variation, usually modified because a single fleet being attacked interrupts the convoy, so I would opt for a safer position.
I'm a little surprised that England actually does better than Austria here at php. England is very difficult to play in a setting where convoys are penalized, and England's expansion hinges on successful convoys. Austria, however, does not have to worry about these sorts of things, being a terrestrial power. But I suspect that it is simply Austria's focal position and multiple borders that are it's downfall. I like to play Austria a lot, because it is diplomatically the funnest.
Regarding Germany, other than a strong Turkey and a strong France, I most fear a strong Germany. They have the potential to expand very quickly at the start, and even when you think you have them down, they can quickly turn the tide, and expand quickly once more. They are in a position to grab a lot of SC's in a short time, so if you let them, they will boom. It surprises how many games I see the german player attack the austrian...
Russia most likely loses, because Turkey is particularly strong. The struggle to build a North Coast StP fleet is a big problem as well. England seems particularly inclined to capitalize on this fact, and often takes the dead end that is StP. Since Russia will find little success in the north without some particular diplomatic circumstances, they usually turn to fight Turkey, and/or Austria. A fight with both Turkey and Austria ends often in disaster for the Russian without dedicated foreign aid. If Russia opts to challenge Turkey, and the two go at it in earnest, the fight is usually swung in Russia's favour. Of course, even with this victory, the inflated appearance of Russia's territory is quick to spark an alliance against Russia, and despite it's impressive appearance, homeland Russia is not very defensible. So most Russian players it seems, opt for a cherry picking against Austria. Of course, unless the Turk is completely pacifist in nature, this route benefits Turkey too much for the Russian player to compete. Russia is a very demanding country to play, and requires careful Diplomacy. While most countries are eager to form relationships, other than Turkey, they are quick to reverse them, in the wake of the inflated appearance of Russia's territory.
I would also like to point out that, randomness should not be used to justify the statistics. Postal and face to face often uses random draws for countries, and there is no inclination of "experts" to choose Russia.