Ok, good presumably you do, so I need to have you do something. You're going to find out the timing for the fightfeed/BA regen thing for your connection, to do this, you need to have the Chrome browser.
Then load the CB homepage. And click this in chrome:
Now, you should have this bar at the bottom of your page, click the "Network" tab and it should look like this:
Now, the tricky part, you want to look at the new elements that appear, it should be "sidebar-heartbeat.tcl" loading. Look at the "Time / Latency" column, and tell me what the average time is listed there on this thread. That will help me a lot. Thanks :)