Not too sure how many 7's he gets, but he has had a few this season - two in the Cup against a team 3 levels above where we lost that I can recall. He also got three 7's in three games where he was injured within the first 30 mins or so earlier this season, but other than that he often performs with 8's as a minimum and often gets 10s.
You are right in saying I have quite a few 7* players, although its not a full team of them, I have 6 currently with the rest scout.
Foster has just got his 50th goal for me this season today.
My second striker is my second best scorer on 15 - although I often sub/rotate him with my other striker, so its not in as many games.
My two ML/MR players then take third and fourth on my scoring, with 13 goals each, with a MR fifth in the rankings on 7 goals.
I have noticed that my wide players (I won't say wingers - as I don't really play with them), the MR and ML players seem to be chipping in with more goals than usual, but for me personally I've not noticed my strikers failing to find the net.