No it isn’t.
I’m in Europe and 90+% (my best guess) of light fixtures are E-type. All of mine are, save for a few neon (flourescent) lights. Same for my office, and anyone I know. I have a few CFLs and they have the Edison screw.
Those MR16s are more of a designer/specialty variant. Just like in the US. The market share is small compared to the E-type (of all sizes), which is the *standard* for incandescent bulbs of any variety, including reflector bulbs etc. Trust me on this.
Ok, whatever you say.