Not surprised. I couldn't understand the optimism since the title was first announced. It appeared that everyone was raving about the fact that Knuckles, Tails and Amy are playable without thinking about the fact that the first gameplay trailer looked alot like who shall not be named. The mere fact that they gave the title to a studio that has not released a game yet shows how much they actually care.
One might think that SEGA wants to avoid, what fans assume to be 'bias' from sites like IGN. Well, not all Sonic games were scored low by IGN. Infact IGN gave Sonic Free Riders and Sonic 4 the highest score out of all critics.
What SEGA wants is a few sales before the bad reviews trash the title's reputation. For those who are looking for a legit good game, you might want to think again. And for those who think they will enjoy the game anyway, it's okay. I'm not telling anyone to not buy it.