Sit 'n Go Strategy study group -- Part I: Low Blind Play

[QuickLearner]

I'm one of the ones who requested this, and I'd like to say how happy I am that Slim took on the responsibility.

I guess I have the honor of asking the first (hopefully not too dumb) question. Part one is all about low blind play, but unless I missed it, the author never tells me when "low" becomes "middle." That's important to me as a beginning SnG player because I need all the help I can get determining when I should begin to shift into a more aggressive gear.

Up to now I've been using 10% of my starting stack as a cutoff for low blind play. If I start with t1500, when the big blind reaches t100 I figure I'm out of the low blind stage. Is that too early?