Nope.
Some Apple stores may have customized versions of specific products based on demand (like a fully upgraded Air), but only the standard models are guaranteed. Everything else is online only.
Alright, thanks. I'm wondering because I want to take advantage of the higher education discount, but I can't do that via the online store.
OF course you can. You just need to use the online education store, not the main store.
Go to the online store, scroll to the bottom where it says more stores and click eduction store.
I don't know where you are, but in the UK you get a better deal online as a partial Applecare is included (repairs, but not extended phone support), but is not in-store.