>I have come upon two instances to shoot for up to 5 seconds >at 10fps which can be really helpful, though I haven't found a >need for 10fps for 9 seconds. I have found the D4 can do that >with an XQD card. In testing, I actually got to 11 seconds of >RAW shots a couple of times at 10fps.
Partly because I was playing with the new camera, but the one time I hit the buffer limit in the D4 was a bull riding event. Since I never knew what would happen, it's hard to anticipate and get just a short burst at the right time, so I was lazy and started shooting as the bull exited the shoot, and stopped when the cowboy was on the ground.
Most times (this was an amateur event) that was about 10 frames.
But several times I hit the buffer limit.
As the evening went on I got better at doing many short bursts as the bull bounced up and down instead. But it was actually quite interesting to look at a "video" (almost) of full frame images later. And I did get some very cool shots at just the right instant.
But I am using a 600x CF card, not even an XQD, so filling up the buffer is a lot easier for me. If I recall about 6-7 seconds.