Congrats on the PR! And on beating everyone 2 AGs down!
For me, a half never feels truly easy; I am pushing to some degree from the start. And I do not like a hilly half. Or a hilly anything. That in itself would certainly make it feel harder than normal. As well as being in the middle of marathon training, with minimal taper. Pretty damn impressive to PR under those circumstances; bodes very well for Beantown!
Dave
Congratulations on a great race and PR! Awesome time! I live in the land of the flat, and try very hard to avoid anything that is even the hint of a hill!