Then again the North American market is ~500 million, the European market is ~750 million. Also the current statistics (I linked to them in a comment below) suggest Linux usage in North America at ~1.5%, and in Europe at ~2%. This suggests higher usage in Europe.
Canada doesn't have Lenovo with Linux preinstalled (only Windows & Chrome OS) on their product list. I would assume Mexico and the other islands are also excluded. So it's really only US vs EU.
It seems like it's changed from about two years ago; really strange.
It's even more apparent when you compare them by GDP.