i have same problem with bf3
my ping shows 50s at browser but after entering game it comes to 700 ms or 1100 ms in minute.
i cant play regularly or admin kicks.
my isp said no problem with connection.
i enabled npapi manually for chrome
win 7 ultimate
modem us robotics 9114 (5 years old)
i was playing game for 5 monts it just started 2 weeks ago.
any ping or trace shows no problem.
problem starts after entering game in 30 seconds.
no problem at my internet connection speed download upload normal as expected only bf3 has problem...