You assumed. That's was your problem. Keyword your. There may have been no sticker saying PowerVR, but I do recall seeing at the store a few netbooks clearly labeled as having US15W, which you could've informed yourself about what that means when it comes to Linux.
You know the old saying, buyer beware. That's especially when you intend to run Linux. You can now post another rage-filled post, it won't change the fact that you assumed instead of properly informing yourself.