There are different ways you can measure penetration of wind energy. One is in terms of absolute megawatts. If you look at it in that way you can see countries such as Germany that have 18,000 megawatts of installed wind energy capacity. Right now we have 900 megawatts. Spain has over 10,000 megawatts. The U.S. will be at 12,000 by the end of the year.
You're right that if you look at this, I have to say the U.S. still doesn't really qualify as a world leader in wind energy either. They have big numbers because they're a big country, in that sense. If you look at the other measure, which is what percentage of electricity is coming from wind, the U.S. is still ahead of Canada, but it's a small number: they're still at less than 1%. It's the European countries that are leading in actually integrating wind in their systems.