I took the freely available ETS test located http://www.ets.org/Media/Tests/GRE/pdf/Math.pdf and found it surprisingly easy. I've started on the Princeton Review (cracking the math subject) 3rd edition and it seems much more time intensive because of the focus on algebraic manipulations, which the ETS sample didn't seem to focus on nearly as much. I also found it to be somewhat more difficult because of this, but it should be simple enough to review all of the little algebraic tricks they want you to use.
My question is this: Is the ETS sample representative of what I can expect, or is the Princeton Review more in line with it, or neither? I'm wondering how much I should focus on cranking out tedious examples. Is speed the major factor of difficulty of the test?