A few statistics for 2014:

1483 pilot entries.
7 flight lines including a control line that stays available 24 hours a day.
34 pilot stations.

Number of remote controlled vehicles last year:
578 classic planes including jets
314 3D planes
355 Electric planes
81 Float planes
63 Helicopter
21 Control Line planes

45 States represented with registered pilots.
10 Foreign countries represented with registered pilots.
94 vendors

We do not have the official figures yet but I bet the event is counting well over 1500 pilots this year.
Does someone know about the number of jet entries?