Exactly - don't let the time deficit build up so that you have to guess on a bunch in a row. Choose the hardest questions deliberately, as you see them throughout the entire section.
I remember learning about the ">2min you probably wont get it right" concept in the time management lab.
You don't remember it quite well enough, because that's not what it says. :)
You need to *average* 2 min on quant; it's not an upper limit. When you go above about 2m45s to 3m,
then you hit the point of diminishing returns - but not at 2m10s, 2m20s, 2m30s.
You want most of your quant Qs to be in the 1m to 2.5m range. You can have a few in the 2.5 to 3m range (2-3 max, really). You may have a few faster than 1m, but they should mostly be guesses, because if you really can solve in less than 1m, you should check your work to make sure the problem isn't really harder than you thought it was.
Do you have a diagnosis history established for your dyslexia? If so, you can apply for extra time on your test. Something to think about.