Personally, I'm hearing it about the same now as I did before the election. Of course, how often we "hear" a phrase isn't really indicative of anything substantive. Governance is not about which phrases are uttered in public.
By the way I just noticed this thread: Dems to add billions to Iraq war bill
But at least you perceive yourself to be "hearing the phrase" 'fiscal responsibility' more often than you thought you were hearing it before 11/06!