Re: Urm..? Nah!
OK, so I don't personally have any figures on corporate take-up of AWS-based solutions, however,I have read anecdotal evidence suggesting entities such as Banks and Universities find the cloud useful for off-loading massive 'batch' analysis jobs without investing in up-front infrastructure roll-out time/costs. But wait, a little company called 'Netflix' managers to put out 1/3 of US peak traffic most nights, running quite nicely on top of Amazon's AWS cloud scaling capabilities.
The Netflix thing is kind of funny to me, as, via LoveFilm, Amazon are one of Netflix's major competitors! So, it like Netflix rents a delivery van from Amazon to run a rival delivery service and is beating Amazon at that business! Now that's a cool example of 'recursion' in Netflix's programming model!
Reddit are also said to be using AWS, so too are Spotify and many other, see: