[malandrew]

IIRC some piece of news surrounding all this stated that the NSA considers anyone using cryptography to protect their communications to be people of interest, whose dragnetted correspondence will be stored indefinitely. I'm curious if the NSA prioritizes these people according to how strong their keys are. I imagine that the logic would be that someone using 4096bit keys is either paranoid or really really has something to hide.

[sudomal]

It's more of a sign that the user is au fait with computers. The sort of person with a 4096-key probably looks at the advanced settings to find the option, or carefully reads the manual.