Throttling exists
Without a doubt the network providers throttle when roaming. It may not be the home provider doing it, but it could be the network on which you're roaming. I travel to the US regularly and either every US network is terrible everywhere, or Three/AT&T/T-Mobile are throttling.
The mobile networks need to wake up and realise that they are actually just ISPs these days. Voice/texts are irrelevant as customers mostly care about data. However we're stuck in a cycle of cheapest being perceived as better by our network providers rather than focusing on value and service quality. How long will it be before the likes of Apple bring out a native SIP-enabled iPhone and start eroding the need to be on one network or another? I know we can do a lot of that today.
Biting the hand that feeds IT
