Since I watched them directly from the computer I didn't have the ability to muck around with pause and slow-motion--I sit in a comfortable chair, away from teh keyboard--so I was unable to catalog the references and homages to other anime series they threw into the convention scenes.
I know they were there. There were plenty of cosplayers in the background, but they went by too quickly. (I saw what I think was a Sailor Mercury, though.)
It's the perfect venue for homages: at a con you know there are going to be cosplayers, and some of those costumes will be very elaborate and very well-made, so you can just draw the actual characters.
I would expect a series about fans and doujinshi to contain a lot of anime jokes. I'm looking forward to seeing them.