Usually it seems to be either East Coast (i.e. Swamp time) or wherever the OP is. Being on the Left Coast (i.e. Mordor) I often forget this and check my local time first, which is a miss. And it's pretty obvious when there's a miss.

Also, not every tweet from someone of interest matches a Q post ... if there's no correlation, the thread tends to die in the "New" tab without ever gathering enough votes to transition to "Hot", and Anons are pretty harsh on disproving the proposed link.

However, when there is a strong tie/relation, it pops right out, or makes you go "hhhmmmm"...