Regardless, judging from Dr. Dave's map, Bell is nowhere near 500,000.
My guess is that their Fibe Internet Service may be available in 500K homes but TV, no way.
About half of the COs in Toronto have access to Fibe TV, although not all are fully complete. I looked at a population density map at Stats Can and the densest areas correspond to the initial rollout of Fibe TV. I would expect the household density would be even higher downtown with a high proportion of 1 and 2 person households.
I wouldn't be surprised if there are 500,000 homes with Fibe TV access just in Toronto - not counting those in Montreal.