so to awnser your question: do they read the EU forums.
short awnser: yes.
long awnser: yes they appear to do if we look at the blue tracker here on mmo-champion.
i compared the number of blue posts made on the us forums and the eu forums and these are the results:
US forums:
17 threads with blue responses
EU forums:
7 threads with blue responses
note:
this is a snap image so it should be treated as such (so with a grain of salt
)
also this is only from the first page on the blue tracker.
and these numbers exclude threads made by the account "Blizzard" since this account posts the same threads on both forums