Nick - I'm merely looking at the practicalities of data throughput and the variables that impact the ability to get pictures. Test websites do tests, which are sometimes an interesting read from a theoretical standpoint, but the practical realities need to be factored in as well
Burst mode is often used by both sports photographers and bird photographers, who are more interested in getting the right action "shot", hence they will default to jpegs to maximize the shooting rate, rather than go for greater quality potential of RAW. I can't think of too many shooters that do burst mode RAW captures.
I almost never shoot burst mode, because I am neither a bird nor sports shooter. In fact the last time I remember using burst mode was to capture an erupting geyser a few years ago, and here I was okay with a full buffer from raw data, as the interesting part of the eruption was less than two seconds, so getting around 8 shots was more than enough for what I wanted.