I've definitely witnessed firsthand the nontrad phenomenon that WS has pointed out.
Please, please, PLEASE do not isolate yourself via age.
The best way to look at it is this, when you're in med school your age starts over.
Within the pseudo-hierarchy of medicine it doesn't matter how old chronologically you are, but moreso how long you've been in medicine.
If you were a billionaire hedge-fund manager prior to medicine then that's outstanding for you, but in medicine we don't care about much else than what is currently in front of us.
If you see yourself by position year, pay respect to those above (and alongside) you, have a genuinely likeable personality who is not afraid of being part of a TEAM, then you will excel. This is what I tell everyone, but for some reason I have come across a few nontrads that were unable to take advice/help from fellow students or residents for what appeared to be disregard of that advice based on the fact it was coming from someone much younger.
This definitely is not the majority of non-trads but I've witnessed it firsthand with two people. They also avoided fellow students and tried to be besties with attendings (even though the attendings mistook them as annoying kiss-*** medicals students) just due to age differentials.