1) Kick-off from the 40 instead of the 30
2) Smaller ball
When comparing to high school, you also have to consider
1) Kick off from the 40 instead of the 30
2) 2 inch tee vs 1 inch tee
Now, a good kicker can adjust to a 1 inch tee fairly easily, so for the sake of argument we'll throw that out. But the kicking from the 40 issue is still there. So for a guy to be able to put it in the endzone in a college game he has to be able to put it THROUGH the endzone in a high school game.
I'm not excusing our guys because they should be able to do more than they actually can, but the idea that any Joe Blow kicker from any high school can put it in the endzone just isn't true.