The attack is in response to claims by Nvidia that there were USB problems with ATI's Radeon Xpress 200 chipsets.
"The Nvidia mailers, quoting a US-based review site, pointed out that ATI had problems with USB on its newest Radeon Xpress 200 chipsets. The USB controller in the Radeon Xpress 200 south bridge is about half the speed of Intel and VIA solutions, and it uses twice as much CPU time."
This prompted ATI India to say some pretty mean things back; to rubbish Nvidia products in general and claim that they are universally flawed.
"We can point out 100 flaws with Nvidia drivers and its cards. They cheat the consumers all the time. We can actually kill them as our products are far better. We take the interest of the consumers at large, unlike Nvidia. The users of Nvidia 6800 GT will realize that its technology is not good enough to support the next generation graphics that Longhorn or 64-bit needs." - Suki Matharu, country manager, ATI India.
The bugs that ATI refers to apparently relate to Nvidia's SLI (scalable link interface) capable motherboards, defective BIOS components, lack of product availability for months, poor game compatibility, visual artifacts, high cost, excessive heat and noise and a host of other criticisms.