You can't accurately test the leveling speed, there will always be people that will rocket through regardless of how hard you make it lol
What were saying is quite simply people will not work hard to level to test that higher content to be wiped afterwards. Simple fact is they won't want to do it again.
Like myself, I know for a fact, I will burn my want to play if I grind (Like I have been only to 22!) only to be wiped. Because I want to play this for real, I have to not play beta so I don't lose interest, cause I don't want to grind twice...this unfortunately will have a negative effect on testing, which inevitably will result in a buggy release anyway! Cause another potention wipe again?
See the problem yet?