According to the event page, 2,367 of the 6,000 I/O attendees actually
checked in using the new version of Google+, then having the option to turn on
party mode, which shares all of their photos on a public stream. The event was
public because Google turned it into an “On Air” event.
A lot of folks showed up to see Train and Paul Oakenfold perform, and it
seems like quite a few of them shared photos to the
event page. It’s not known how long the party kept up the 8K photos per
hour, but it’s impressive none the less.
I have however noticed that a lot of photos not taken at the event made its
way to the stream. I’m not sure if that’s a bug, or if that’s a bi-product of
the event being “On Air.”
According to the slideshow from the event, 13,345 photos were shared in
total:
You’ll see the photos on the page sorted by popularity, which includes +1′s
and comments. It’s not surprising that the most popular picture if of Gundotra
and Sergey Brin, sporting the Glass.