I haven't seen another penalty awarded for or against since I saw one in the first match. I see a penalty in about 2% of games, so it seemed like a good likelyhood that the refs were improved. Now I think it was just a coincidence though, however I'm going to keep my eye on the stats to see if it happens more often.
I do think the players are all slower though, and in some ways this means you have more time on the ball, and can hold posession in and around the box more... Which may be why penalties might be more frequent. I've seen a few blatant fouls though so again, refs seem the same to me.