The quant and verbal subscores are not on the same scale - so you'd need to get a 51 on quant in order to hit the 99th percentile, but only a 46 on verbal to hit the 99th percentile. That's why it seems like the verbal is scoring "harder" - it's on a different scale.
That also explains your results on the verbal portion when you got 3 wrong and got a scaled score of "only" 47. Because the 99th percentile on verbal starts at 46, 47 is a fantastic score. :) Except for those literally scoring at the 99th percentile in a section, people get a lot more than that wrong on a typical test.
You can download a representative score report with the scores and their corresponding percentiles from the GMAC web site (
www.mba.com). Happy studying!