Wonderful. Fabulous. So what?
Let's keep in mind that those hitters he was shutting down weren't MLB hitters. Kaz Matsui was an MVP in Japan. Hideki Matsui was hitting 50 bombs.
Yeah, Matsuzaka looked good in the WBC. Two ER in 13 IP. Impressive. But, because of pitch counts, he didn't go deep in games, so we didn't see how he performed with fatigue. Also, spring baseball is the time when hitters don't quite have their timing and rythm down, and none of the hitters had seen him before. And, this is while facing Chinese-Tapei, Mexico, and Cuba. Mexico had Cantu and a bunch of MLB bench players. Cuba had a couple of guys that would be MLB regulars, but it was no killer lineup.
I'm not saying this guy is destined to be a bust, but I'm not sure he's worth the hype right now. Missing out on him could be a mistake, but I think the risk of being stuck with a big/long contract is much stronger than the possibility of this guy becoming an MLB ace. I'm no huge Zito or Schmidt fan, but I think you know what you are getting more with these guys.