To the extent we're able to tell (and we probably can't) it sure looks like the *debate* shift in the polls was very modest but the post-debate Dem and media freak-out shift in the polls may be somewhat larger. Still small enough that all of it could easily dissipate quickly. Or not! At any rate...
My data-free observation is that it hit a deep and longstanding worry among most Dems both in and out of power, and everyone is variously freaking out (we may need to replace him!) or coping (it's overblown, just ignore it!).
my data-free observation is that this is kinda media-manufactured (and twitter glomming onto like 5 awful screenshots) but it got this big because it hit the big worry
