From his article it looks almost as if the patent threat was worse for European businesses than it is for US ones, because it is easier (or less risky) for US business to come to Europe than the opposite. But US startups have to face that threat in their home market, and the situation there isn’t any better for them than it is for their foreign competitors. So they could never get the chance to come to Europe, if they don’t even get the opportunity to start.
I still think that the threat is bigger for US startups than for EU ones. Maybe that’s not true for big businesses, but I’m not convinced of even that. We’ll see