I don't know where they are getting their numbers, but the one I can easily fact check for you are flat out wrong, and the other ones all strike me as very suspicious.
> Canadians could expect to wait 4.3 weeks for a computed tomography (CT) scan, 10.6 weeks for a magnetic resonance imaging (MRI) scan, and 3.9 weeks for an ultrasound.
I've had multiple ultrasounds (outside of a hospital, no urgency) the waiting time is literally 0. I walk in to the imaging clinic and hand them the piece of paper the GP gave me 10 minutes ago and get one.
I've had a CT scan (in a hospital, medium urgency), the waiting time was "a few hours".
I've never needed a MRI, the only person I know who did need one (very urgently) got it within hours.
The waiting time for specialists does not strike me as believable, but given that there is variation across the different fields I can't authoritatively say they are wrong. For context, I just needed to see both a dermatologist and a urologist (nothing serious, no medical related urgency), the waiting time was roughly 2 weeks and 3 weeks respectively.