Retina MBP, grey screen of death (GSOD) 3 times in first 4 days. Hardware issue?

I just picked up a Retina MBP 4 days ago. So far I've mostly just done light web browsing on it (using Google Chrome Canary), maybe ten hours of total usage. It's died to the Grey Screen Of Death (GSOD) three times so far. Is this likely a physical hardware issue, or are there some software kinks they are working out? Should I try to return it within 14 days, or take my chances getting it fixed if it turns out to be a hardware issue?

This is my first mac (previously all thinkpads), and I have to admit that if a windows laptop BSODed on me three times it would be in the return mail, and I wouldn't even bother to re-order. This is because I have enough experience with windows to know that three BSODs doing nearly nothing is absolutly a hardware problem. What's it like on the Apple side of the fence? Is this probably a hardware issue, or possibly poor quality control on drivers?