Not sure if it means there's any hope for a show in the coming days, as it likely won't brighten THAT much, but it's interesting, to say the least. We'll find out over the next hours and days.
Not sure who this particular account is representing (doesn't seem to be anyone at NASA, at least), but someone named @SungrazerComets says "Alright we're calling it, and you heard it here first: We believe some small part of #ISON's nucleus has SURVIVED perihelion."
/shrug