Originally posted by rawr Yes, but that camera still has to work very hard at it, even though it only has 18MP.
As I understand it, the Canon 1Dx has 2 x DIGIC 5s for the image processing, 1 x DIGIC 4 to process the AF and metering, and can still barely achieve 14fps, relying on a special JPEG mode (with the mirror locked up) to make that speed.
A better performance example may be the 28MP Samsung NX-1, which can burn along at 15 fps shooting RAW with continuous AF (!). But then again, it is mirrorless.
Yes, there are (at least) 2 problems: moving the mirror and shutter; and capturing the data.
Here is a list that I built some time ago and posted elsewhere. The numbers after the camera name are in the format "FPS * MP = MP/sec", in descending order of data rate.
NX-1: 15 * 28 = 420
A77: 12 * 24 = 288
5DS: 5 * 51 = 255
1Dx: 14 * 18 = 252
A65: 10 * 24 = 240
K-3: 8.3 * 24 = 199
D810: 5 * 36 = 180
D4s: 11 * 16 = 176
D610: 6 * 24 = 144
If someone argues that a full frame mirror and shutter can't operate (say) at least 11 fps, I can point to a couple of cameras where this isn't true.
If someone says that a 36 MP camera has too much data to be captured at 11 fps (= 396 MP/second), I can point to a camera where this isn't true.
I'm not saying either of these is easy. Just that they are both possible. We are not talking "whether", but "when".