When they talk about throttling a connection, they are talking about altering the bandwidth available for a particular connection based on overly heavy usage. Unless you are downloading entire DVD's of information, you probably don't fall under that heading.

If you can't connect reliably, that isn't throttling, that's more than likely a technical problem with the network equipment rather than the ISP throttling your connection. All it takes to reset the switch port your connection is going through is a few keystrokes, so if there's an issue on their end it doesn't take much to clean things up.