What % of the Pros are winners at the High Stakes NLH?

[TraiViet]

I've been around different websites and i've seen the game have been tighten up quite a bit.Party and Pokerstar are the only one with full rings high stakes games and the action is very tight (flop seen is under 30%).The short hand NLH is becoming more popular now. My questions are:
1)What is the % of the pros are winners at 5/10 NL or higher? What is the % of those that break even?
2) Should I change/transform my game to short handed NLH?