Your ISP might not be throttling your connection but just remember your ISp doesn't connect directly to the server. It connects through other ISp providers to make the hops to the server. So it can get bottle necked making its way to the servers. We unfortunately have zero control over that. Also I am in no way making excuses for the way the servers have been acting but everyone needs to remember just because your ISP provider might not be throttling you doesn't mean your not hitting an issue someplace else down the line... We have had many threads on this subject and yes it's true it might not be your ISP but down the line where it gets passed off can be the issue and there is zero you can do to fix that. In the last year we have had many threads on this and yes it ended up being the other connections from your ISP to the servers as your ISP does not connect directly from your router to the servers as I'm sure you know. But as I said please don't think I am making excuses for what has been going on! Everyone's ISP provider hands off to the next provider to provider until your at the server which isn't in a country with the best ISP provider to begin with. So yes it's true you might not be getting throttled but down the line you might be when your getting passed off to the next guy... You know that ISP providers are looking to pay the least amount possible so don't expect them to care if your getting the best speed/connection down the line.
I can try and find the thread we had going with all of this explained if needed... But we had members checking channels that they were having zero issues with while others were having issues with.. Unfortunately I have not read anything that might correct the issue as you can complain till your blue in the face but that's not going to help ;(