Traceroute from Germany shows that none of leave continental Europe, at least not this morning. Are you suggesting that they'll cross-subsidise? That they will raise their euro-denominated prices in order to compensate for increased costs in the US?

They might. Of course. Vendors will raise prices where they think the market will bear it. But it seems strange to assume that by default, vendors will respond to raised costs in one market by raising prices in another.