Thanx for them details Julian
Yes BPS are interesting also - one thing I have noticed and thunk about a bit

is with Dsr terrestrial photo's and I assume the same would apply to any cameras captures and that is when a photo, say a landscape full of colour and good light, then that single photo file is actually significantly larger than say a low light Image with little color, ie: 10MP & say 5-6MP respectively !
Hence, each pixel in the 1st photo has recorded more information and ultimately near 'full well' capacity - so there is more Bits of info overall.
In saying this, if transferring dater at fast rates, I would expect that say a rather bright jupiter image taking up 1/3 - 1/2 of the chip would transfer slower than say Mars which may only be taking up 1/8 or 1/10th of the chip ?
Just a thought !