Not that I have much to add other than here are some numbers from this weekend shoot at the track that I will use for comparison when my D7100 comes in.
D300 shooting at continuous burst, Raw at 12-bit lossy with 80-200 2.8 lens, SanDisk Extreme IV 8GB CF card at fast turbo drag bike .
I performed a continuous burst of 21 frames before I audibly heard the camera slow down . The image sizes are 4288 x 2848, 1/1000 at f5, ISO 200 and the file sizes are ranging between 11.5 mb to 12.5 mb .
Unless the action dictates I only shoot burst of 3 to 5 frames to capture the shots I need .