Outside Europe I rarely see <<>>, in fact I never saw <<>> on the internet even on European sites, truth be told I rarely read any websites from Europe that are not in English so my opinion might be biased
I would have sworn that I had seen the title marks used for both as well, but it has been 10 years or so since I have had any real exposure.
Those aren't rare in French-speaking communities (although " is dominant because of how bad the AZERTY layout is), and they're mandatory in press.
Another issue is that you are supposed to type a non-braking space inside, which is a hassle, and often not present on keyboards either. Word processors usually take care of both these issues, replacing " with the appropriate (opening or closing) guillemet + space.
Spaces are also used in Switzerland, but narrow (&nnbsp; instead of ).
"…" is genarally ok for casual writing and messaging, while „…“ is still standard for print.