It's never a good sign when a publisher waits until release day to send out review copies of their game. This means they're buying time, hoping the game will at least get through its first weekend on sale before getting its face kicked off on the Internet.
But it's an even worse sign when the publisher doesn't send out review copies at all. Not even if you ask nicely. Seven times. This means they know the game isn't just bad, it's wretched. Perhaps it's unfinished, or unplayable, or has graphics that make the Coco Pops monkey look photo-real by comparison. Probably all three.