Normally in the high speed continuous shooting mode, three shots can be taken within 1.5 Seconds.
I stumbled on a realization that one can actually take (at least) five images when using the SanDisk Extreme III Compact Flash Card - I used the 1 GB Extreme III card and was amazed to see a series of five shots taken had been taken of a wave breaking over the breakwater in King Harbor (Redondo Beach) - With a Ultra or Standard CF card, normally the Canon G2 takes three (in a second an a half) before the buffer / CF write delays the sequence.
This sequence was hand held - a Tripod would have helped...
I'll have to try another "sequence" of shots to see just how many shots I can get before the buffer/CF write delay pauses he series of images
From the more properties field (reading the EXIF data) the "Date and
Time" for each of the images is as follows: