Interesting. As they say, they are clearly trying to become a Tour preparation race. Also, after the last two years of horrible weather, a lot of the riders are probably saying "F that, I'm not going to California to freeze my ass off and get sick before the season gets started." So that's a good reason to move it - May will mean beautiful racing conditions in California, no doubt. On the other hand, expecting that tons of Tour-caliber riders are going to be eager to fly halfway around the world so far into the season seems a bit optimistic. In fairness, they don't have a whole lot of choice if they want to increase the international standing and prestige of the event, and they've been wanting a mountain top finish pretty desperately, but still. If they're able to keep this thing going over the next several years, it'll (hopefully) build itself up, but I wouldn't expect miracles next year. It'll be a good race, though. Thoughts?
ETA: "The Giro is a great race, but very few cyclists who are serious about the Tour de France will also race the Giro." That seems blatantly counterfactual to me - yeah, lots of the serious Tour guys take May off, but there's been a resurgence in Tour hopefuls using the Giro for prep in the last couple of years, so they could well miss out on a lot of big names. At least in February there wasn't anything else going on.