Pushing a single change for review can take minutes

kkoehne@garvin:~/dev/creator/src/plugins/debugger$ git log codereview/master..
commit c2732641950cf4ea46db93b35e6642020579cea4
Author: Kai Koehne <kai.koehne@nokia.com>
Date:   Wed Jun 8 17:00:46 2011 +0200

    Debugger: Allow users to disable warning about unsupported breakpoints
    
    QErrorMessage has by default a 'don't show the message again' checkbox.
    
    Change-Id: I4bbb2172298db848870ed1abf9f7d6195bdfe49d
kkoehne@garvin:~/dev/creator/src/plugins/debugger$ date; git push codereview HEAD:refs/for/master; date
Wed Jun  8 17:03:01 CEST 2011
Counting objects: 21227, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (5040/5040), done.
Writing objects: 100% (16094/16094), 4.96 MiB | 21 KiB/s, done.
Total 16094 (delta 13696), reused 13335 (delta 11024)
remote: (W) c273264: commit subject >65 characters; use shorter first paragraph
remote: 
remote: New Changes:
remote:   http://codereview.qt.nokia.com/400
remote: 
To ssh://codereview.qt.nokia.com/qt-creator/qt-creator
 * [new branch]      HEAD -> refs/for/master
Wed Jun  8 17:07:05 CEST 2011

kkoehne@garvin:~/dev/creator/src/plugins/debugger$ git remote show codereview
cat ~/* remote codereview
  Fetch URL: ssh://codereview.qt.nokia.com/qt-creator/qt-creator
  Push  URL: ssh://codereview.qt.nokia.com/qt-creator/qt-creator
  HEAD branch: master
  Remote branches:
    0.9.1-beta tracked
    0.9.2-rc1  tracked
    1.0.0      tracked
    1.1        tracked
    1.2        tracked
    1.2.90     tracked
    1.3        tracked
    1.3.0      tracked
    1.3.0-beta tracked
    1.3.1      tracked
    2.0        tracked
    2.0.0      tracked
    2.0.0-beta tracked
    2.0.1      tracked
    2.1        tracked
    2.1.0      tracked
    2.2        tracked
    master     tracked
  Local branch configured for 'git pull':
    master merges with remote master
  Local ref configured for 'git push':
    master pushes to master (local out of date)
kkoehne@garvin:~/dev/creator/src/plugins/debugger$ cat /home/kkoehne/.ssh/config 
SendEnv GIT_FORCE
SendEnv GIT_PUSH

Host codereview.qt.nokia.com
        Port 29418
        ProxyCommand /usr/bin/connect-proxy -H nokes.nokia.com:8080 %h %p
        User kkohne