The same is rather crude, I grant you, but I'm not sure the low numbers for Wales or Yorkshire are surprising. There's not much purpose in garrisoning either one for a long time unless there's a protracted attempt at an invasion of England. On the other hand, a larger data set (preferably collected by someone else) would most certainly be welcome.
For full disclosure, these are the games I sampled, with the outcomes in parentheses and the number of turns each of the English non-SCs was occupied appended afterward:
gameID=167077 (Fra 18, Tur 13, Rus 2; 18 turns) - cly 1 wal 1 yor 0
gameID=166714 (Rus 16, Fra 10, Eng 8; 26 turns) - cly 0 wal 0 yor 0
gameID=166537 (Eng 17, Aus 14, Rus 3; 33 turns) - cly 0 wal 2 yor 2
gameID=166412 (Tur 18, Eng 13, Ger 2, Ita 1; 20 turns) - cly 0 wal 2 yor 0
gameID=166295 (Rus 21, Aus 8, Fra 3, Eng 2; 16 turns) - cly 0 wal 0 yor 3
gameID=166148 (Ger 17, Tur 17; 26 turns) - cly 2 wal 3 yor 6
gameID=166064 (Eng 18, Tur 9, Aus 7; 38 turns) - cly 0 wal 2 yor 3
gameID=165994 (Aus 15, Ger 13, Ita 6; 22 turns) - cly 2 wal 3 yor 5
gameID=165921 (Tur 14, Ger 9, Eng 6, Russia 5; 21 turns) - cly 0 wal 0 yor 5
gameID=165801 (Fra 17, Tur 11, Rus 4, Ita 1, Eng 1(res); 26 turns) - cly 0 wal 2 yor 1
England did do reasonably well: 2 wins, 2 draws, 2 survives, 1 resign, 3 defeats. But though the number of defeats might be a bit lower than the average (what is the average?), I think saying that England was dominant throughout is a bit strong.