I wasn't aware that we had HD radio in Canada. What market are you in? I seem to recall a couple of Toronto market stations tried it out years ago, but abandoned it.
I've had RDS data (mainly in GM cars) for years that'll show Artist and Song (or whatever the station decides to put in the stream - one station gives weather updates), but have never observed an HD signal. One of my past cars would auto adjust it's clock from a time stamp in the RDS signal, but the stupid radio station was always blasting out the wrong time! I called the station engineer who wasn't even aware that in addition to the text data they were sending out a time signal!