As a TekSavvy customer, I can guarantee you we either aren't being throttled, or we're getting around it. I used to be on their DSL service provided by Bell's last mile, and I've since switched to their cable service on Rogers' last mile. It's true Bell throttled all of their lines, including the wholesale customers, but TekSavvy specifically supported MLPPP on their precisely to get around this, so it wasn't an issue for anybody who was actually, you know, tech savvy (pun intended).
Rogers doesn't throttle their wholesale customers at all. It's always possible they might start, but with Bell backing off throttling now, Rogers is the only major ISP left who is actually throttling at all in Canada, as far as I'm aware. I think it's highly likely Rogers will soon be going the same route, and extremely unlikely that they'll go the complete opposite direction and start throttling everybody the way Bell was.
If the reason for this change really is because they've got all their customers on UBB plans, then the independents like TekSavvy have an even bigger advantage over them than before. Their caps are huge in comparison (300 GB on every one of their plans, and unlimited options available).