« on: November 06, 2011, 09:10:23 AM »
Unfortunately not and it's a common missconception, there might be a slight advantantage, but it is slight. This is because the bottleneck in the system is not the memory card, or the buffer, it's the image processor. The data from the sensor is written to the buffer, processed, written back to the buffer and then to the memory card, when the buffer fills up it isn't full of data waiting to be written to the memory card, it's full of data waiting for the image processor to catch up. A faster memory card can't make the image processor work any faster, all it can do is empty a single image from the buffer a little bit quicker, and if you still have the shutter pressed another shot can be taken.
That is the correct order of the processing but I'm not sure the image processor is the bottleneck as you suggest at least not with current generation processors and files sizes. The following quote from a Canon website http://cpn.canon-europe.com/content/education/infobank/capturing_the_image/digic_processing.do confirms the order of processing but implies the image processor is not the bottleneck.
"To overcome limitations with processor speed and capacity, manufacturers can install large and expensive buffers as a temporary store for unprocessed data, or compromise image quality by â€˜dumbing downâ€™ image processing, or both. DIGIC II is designed to avoid these compromises. The processor is so fast it can read, process, compress and write JPEG image data back to the buffer between exposures."