I'm not sure that I understand what you mean?
It's been a few years since I last used MWEB but they were my primary ISP for about three years. I always managed to get my maximum throughput (4Mbps) with them and never had any complaints with Steam, Skype, Youtube, browsing, gaming, etc.
The only thing Mweb sucked for, without a doubt, was peer-to-peer traffic. It was shaped to shit.
From what I'm aware, it's still much the same with their premium accounts--most protocols work beautifully but "piracy-associated protocols" are pretty much unusable.