I think it might depend on whether you're aiming for a career in academia, where there's a certain amount of (de facto, not necessarily conscious) age discrimin

I think it might depend on whether you're aiming for a career in academia, where there's a certain amount of (de facto, not necessarily conscious) age discrimination. If not, I doubt it matters, but either way, 2 yrs seems fairly trivial. I finished my master's around 30, and I'm doing fine (in a non-academic job).