He's been in his 30's in Dan Slott's recent/not very recent run - but that was recently retconned and he's 28 now - bitten by the Radioactive Spider 13 years ago, so...
I can tell you this with absolute authority, the Peter Parker from present day 616 continuity has never been in his 30's. Ever.
It's canon that he was bitten when he was a sophomore in high school.
In the not-too-distant past, the Fantastic Four's rocket launch was set on a sliding time scale of "10 years ago."
In recent years, that increased to "13 years ago."
At no point in Marvel 616 lore has it ever stretched further than that. And the FF were already a number of adventures in when Peter got bitten by the spider. Therefore the oldest he could possibly be now is 27 or 28 years old.
Not really up for argument. These are the facts. This is the way it is. :-)
i was right?!?!
screw being humble!!
*does happy dance*