Well in all fairness, he did say fundamental particles.... and then within our grasp...
He didn't actually say send information or a signal or *material* FTL. So he didn't really cross the line.
I don't know if I'd go so far as to say *well* within our grasp... but conceptually it's hopefully in our grasp as things keep changing and new physics are found.
At this stage in the game in my studies... I can't say that without a doubt... anything in particular is totally impossible... just improbable