Between your first and second post, you redefined your debate from 'Scarborough versus Oakville, subway vs. LRT' to 'Sheppard & Kennedy stop spacing, should it be closer or farther apart.' That's a pretty radical change, don't you think? The 'dense enough for subway' portion of your first post also seems to have gone a bit by the wayside, and it was that part I was addressing.
I don't consider Richmond Hill any more 'urban' than Agincourt Mall. And, yes, I define any place where you shop by going to a mall surrounded by parking spaces, and go to the dentist by driving in your car and parking in a strip plaza, as suburban, irregardless of density. (Having said that, I'd be VERY surprised if Sheppard east of the 404 is as dense as the least dense part of Bloor-Danforth, which would be east of the DVP as well, I suppose.)
The 416 and 905 suburbs may be different, but they're both still suburbs. And, even density on Sheppard is extremely punctual once you cross the 404. You're sitting in one of the nodes, marvelling at the density. Go back to Vic Park, or farther east, and the density drops signficantly until the next node (Markham Rd., e.g.)