Well you can't say all or none..that's to heavy of a statement. Surely some are and some aren't.

Perhaps a better question is how many are killed on an outfitted hunt versus a, do it yourself hunt.

I'm not saying there is anything wrong with an outfitted hunt, I've been on one! But I also passed up bucks on that hunt that i'd droll over in my home woods. My hunt was in Texas and it was NOT in a high fenceenclosure.
It was a great time..although different...even the "satisfaction" was a different feeling..but i'd love to do it again.

Also this was a one price hunt, i could take a spike or a world record, the price did not change based on the kill and there were no outfitter imposed limits.