This thread reminds me of a call to India for tech support.
"No sir, we are not having a problem with our server. It must be your problem, because it doesn't happen to us."
The slow and lock happens to me too. Happens with my home broad band, 3G iPhone and the T1 at work.
When it happens I go to another site and come back after a while and it's fine.
Love those intermittent problems. Just like going to the dealer.....again and again to find out it was a loose solder on a crappy connector.