No, Beanfield is probably not solely dependent on Bell and/or Rogers for transit. Toronto is one of the few cities in Canada where there are loads of transit providers to purchase bandwidth from (including most tier 1s). There are also multiple carriers with transport fibre going east and west from Toronto that is not owned by Bell or Rogers. Bell and Rogers are not the most competitive for transit, but they may well be in the mix that Beanfield uses.
That said, if 151 Front Street West gets wiped off the face of the planet, the internet is probably going to be degraded for just about everyone in Ontario.
That said, if 151 Front Street West gets wiped off the face of the planet, the internet is probably going to be degraded for just about everyone in Ontario.