I didn't make it past my first interview.
This first interview was one hour long and was purely focused on how to programe GPUs to push the GPU to its limits. All of my experience is on NVIDIA GPUs, so just talked about my CUDA and PTX programming experience.
There were no coding questions on this first interview.
Although I felt like I severely impressed my interviewer, I did not make it past the first round, as there were better candidates, so competition must be pretty fierce.
The interviewer was nice and friendly.