Well the soft level cap is 100, and every level you get 3 points to invest in parameters as you choose (with the exception of putting all three in one parameter). Having said that, each parameter caps at 99. So while it's not possible to cap every parameter, capping 2 or 3 is very possible. I think the best answer to your question is that level-wise, 70+ is considered high performance while parameter-wise it depends on the parameter since the stacking on each stat differs depending on how many points are invested and what the stat is.

EDIT: The average of your starting parameters is somewhere between 7-10 depending on how you build them, but in the long run that matters less. It's just our way of making sure nobody starts overpowered in the early game.