Stalling is ghei but occasionally +EV. Scuba, in your situation, I think you're making quick decisions and making the blinds come around as fast as possible for the other players, forcing them to make decisions for 10% or more of their chips as many times as possible, and allowing you to potentially absorb their mistakes.
In 2-3 table SNGs, stalling is generally -EV unless the tables are very close to merging. The general idea is that you can increase the number of chips at your table by knocking a player out and bringing another player over from another table, and by playing more hands, you increase the likelyhood that this will happen. Stalling is +EV when you are close to a merge, generally, because if you make the merge before you hit the blinds you will get at least a few more hands before the blinds, and a much longer orbit.
In a 1-table sng, stalling as the largest stack is +EV because it causes the blinds to raise at a greater rate comparative to the hands played, forcing people to play more marginal hands while you can trap and bait them with pot odds. As a short stack, stalling is similarly -EV for the same reason.
Also, if you have tight average stacks to your left, stalling may make pots bigger to steal, as they are less likely to look up your pushes and raises. This is true of any size stack, however, I think as a short stack the higher blinds affect me more than the average stack, and also the pot odds for them to call your pushes and raises become much more tempting.
Similarly, if you have an aggressive player directly to your right, stalling is likely a poor decision for the reasons stated above.
I'd like to see some commentary on how and why you can stall during postflop play to influence your opponents decisions, and, if you pay attention, can you use stalling as a tell in certain situations?