Beyond what everyone else is pointing out: no, wind is not baseload; it's intermittent. But:
1) Intermittent + Peaking = Baseload
2) Intermittent + Storage = Baseload
3) Intermittent + Hydro uprating = Baseload
4) Intermittent + Different kind of intermittent = Less intermittency
5) Intermittent + Geographic diversity = Less intermittency
6) Current grid = Demand intermittency (aka, we're already used to dealing with the situation, just in reverse).
Yes, high wind penetration means better grid interconnects and/or more peakers. But wind is so damned cheap now (contracts on new wind farms in the US averaging around 2,5 cents per kWh) that you can afford to invest in better interconnects and peakers. Which does everyone a service, because it makes your grid more reliable with conventional baseload plants or existing links go down. Solar, by contrast, is more expensive than wind (the cheapest new contract in the US being 4 cents per kWh - although places outside the US are under 3 cents). But solar, in addition to pairing nicely with wind (the latter peaks when the sun is down, the former when it's up), actually reduces peaking demand at low penetrations (offsetting the daytime peak, and corresponding roughly with cooling needs), and doesn't require as extensive peaking at higher penetrations.