Will Day 3 Start Off Playing Like a Bubble Right Away?

I've never played in such a large-field event, so I'm having trouble conceptualizing at what point the bubble will actually form.

There will most likely be around 1100-1150 players when Day 3 starts with the blinds at 600/1200/a200 for an hour and then going to 800/1600/a200 for the next 2 hours. 873 get paid.

I have an average stack of 78K, but that is good for 2nd at the table (leader has only 81K), so there will definitely be some oppurtunities to take advantage of some tight play because of the bubble.

My only question is... will it play like a bubble right off the bat on Day 3, or will it only begin as we get closer to the money?