For anyone interested in an update...
My blown HX750 was delivered to Corsair's RMA facility on 3/8.
It was checked into Corsair's returns system on 3/9.
I received my replacement yesterday, 3/21.
Nine business days to get my replacement PSU processed, shipped, and back in my hands. Not too bad and only one day more than what I expected. The pleasantly surprising thing about the whole experience is that Corsair shipped me a brand new in-the-retail-box PSU complete with cables, pouch for the cables, and velvet pouch for the PSU. In other words, it was the exact same package as I got from the Egg when I purchased my failed PSU. All I sent to them was the base PSU. I didn't send any of the power cables back because they weren't defective. Nicely done Corsair only now I have way more power cables for my PSU than I need.
Core i7 860 | Gigabyte GA-P55-UD4 | MSI GTX 460 1GB @ 780/1560/3900 (display) | MSI GTS 250 1GB @ 760 MHz (PhysX) | WD Caviar Black 640 GB | Antec 900