o2 resolving Google CDN static content

o2_google.txt

# o2 ADSL, Berlin Mitte

# Using cURL, fetch the jQuery library within ten seconds.
$ curl -m 10 http://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.js > /dev/null
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:--  0:00:09 --:--:--     0
curl: (28) Connection timed out after 10005 milliseconds

# Content from ajax.googleapis.com (and fonts.googleapis.com) time out!

# Let's check the DNS.
$ dig a fonts.googleapis.com +short @192.168.1.1
googleapis.l.google.com.
173.194.65.95

# Try cURL again without DNS, and hit the IP directly.
$ curl -m 10 -H 'Host: ajax.googleapis.com' http://173.194.67.95/ajax/libs/jquery/2.1.3/jquery.js > /dev/null
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  241k    0  241k    0     0   782k      0 --:--:-- --:--:-- --:--:--  784k

# It works! So why does hitting the IP directly work, but looking up the domain fail?
# I have been using o2 since September 27 and have had the problem since day one.
# Previously I thought using Google DNS solved the problem, but I got the best
# results by hard coding Google IPs in my host file. But this does not scale.
# See previous Twitter conversations. https://twitter.com/search?f=realtime&q=from%3Asimonmales%20to%3Ao2de&src=typd