I can't imagine them getting too many preorders. This is a ton of money to pay for a lens with a f/2.8 aperture that is a non L lens. The 17-55 is not much more expensive than 1 of these. Plus Sigma & Tamron both have f/2.8 zoom options at a fraction of the cost. Or there are some great options for 24-70mm lenses for hardly any more including the new Tamron 24-70 f/2.8 VC. You can get a 24-105 IS for the same price as only 1 of these lenses and it's only 1 stop slower, but it is L glass, has a tremendous zoom range, and is weather resistant. I'm really not sure the advantage to these lenses. If they were f/1.8 or faster, they would have an advantage over the zooms. If you are using these for video, the sharpness/resolution from Canon's video on any camera (even the 5DIII) is low enough that you will not see the difference between these primes and the Canon 17-55mm f/2.8 IS, even if they are tack sharp at f/2.8. Wtf Canon? Putting IS on these lenses and leaving it out of the 24-70? Who is running the lens dept. The 5DIII was a direct response to everything we disliked with the 5DII. These lenses and the new 24-70 make no sense to most Canon customers.