[stigmata]

1) The rake is a killer until you reach high stakes -- remember you are putting into the pot every hand. Look at how much you have between you after 100 hands, a lot of the money will be gone.

2) Your theoritical winrate varies dramatically between opponents. If you play many really bad, predictable calling stations with a low rake, I'm sure a huge winrate is atainable. These are hard conditions to meet, however.