I see. I guess it's a good universal solution, but as you say, Europe has some catching up to do.

So it's taking a long time to warm up? If you've let the engine get warm, it likely is not the choke, but the carb itself. Has it been sitting for any length of time? Was it winterized? It's not uncommon for these carbs to need a rebuild every few years or so. You might be due.