There seems to be a lot of concern about the Grom's ability to wheelie. Is it a bike that naturally wants to bring the front wheel into the air? No. Neither is a bicycle, my son's CRF70, or my zero turn mower, but I wheelie those things a lot. Wheelies are about technique, and the Grom should be a stupid easy bike to wheelie.
That said, it's one of those things people either have the knack for, or they don't. It's very much a feel thing, and very hard to verbalize how to do. One of the greatest "how to videos" of all time is by the late Samurai Jim. Here's on a DRZ400sm in the video, but for those who haven't ridden one, it's a bike that doesn't want to bring the front tire up easily either, though you'd never know that from his great video. All the same principals apply to the Grom. Enjoy.
[ame=http://www.youtube.com/watch?v=lNQC_amZRJg]How to Wheelie - Supermoto - YouTube[/ame]