I think a couple minutes wouldnt be that hard, since this was my first race, I was somewhat conservative on the start and then towards mile 11 I really dropped the hammer to catch one of the kenyans. The middle of the race played a pretty crucial part in me loosing a little bit of time when I got the side stitch. I think dropping a minute or two could be done with another race or two under my belt. Plus with better practices and some longer tempo runs I think it shouldnt be too bad. Now dipping into the sub 63min and 64min is like going from a high 11 to a mid 10.. Pretty difficult, and really need to have an AMAZING race right from the gun. Hang with the lead pack the whole time and not drop off.