Quote from traderNik:
Part of the reason I decided to play single table tourneys only is that I found my variance to be somewhat more manageable. Others have pointed out that here, you can usually be guaranteed that at least one or two players are going to blow out spectacularly, and that you need to finish in the top three out of 7 players (at Stars, with 9 players/table). This is true of the 5,10 and 20 tables - I am not sure when things get significantly tighter. I am developing a strategy for finishing in the money at these tables and it involves some decisions that may not seem right to a ring game player. Basically I play really really tight for the first while, just to see who will do what and to make sure that I don't raise all-in preflop with i.e. QQ just to have 3 people call me. That avoids some of the wild swings you mentioned, which are definitely possible if you play a lot in the first 20-30 hands. I feel that you should be able to sit down with 10 - 15 buy-ins and build your bankroll from there. I have rarely lost more than 3 in a row, although my equity has taken some swings. I tend to cash out as I go along.
I would be interested to know if others find their variance less at the sng tables than at the standard ring game.