[BC] 50mbit plan, speedtesting at 170mbit?

I'm not sure what's going on, as I've been a BB50 user for the past year or so. Today speeds have gone crazy and are peaking just above 170mbit on speed tests. Has shaw done some silent upgrade without notifying people? If not, do I call CS in case my account is somehow flagged as the much higher priced ones? I haven't been downloading much of anything this month, so it's definitely under 50gigs total month to date.