i see a big drop off at 25NL, but they are there. there just arent 2-3 on every 6max table like at 10NL.
i'm sure the higher you go, the harder they are to find. networks prolly make a difference, too. stars is definitely tighter than it used to be BF (before frist).
LHE is a game where your skill keeps you breakeven until you hit your rush of random BS.
Nothing beats flopping quads while dropping a duece!