Ours is usually a computer-adaptive test that adjusts to the test-taker (questions get harder or easier, based upon test-taker's answers). They are not rushed - I believe they can take their time (DD is usually the last one finished and does very well on MAP tests). The nice thing about this testing is you can see your DD's RIT score and if you look at the norms you can see how that score compares to others of various grades (is it a good RIT score for a 1st grader, 3rd grader?) I have found this interesting.
If she is a good test taker, there is nothing to be nervous about (you or her

). Hopefully, it will give you and the school a better idea of where your DD might be at in her learning.