I just checked the apple reservation system and seems like stock is pretty plentiful.
If you're doing a reserve and pick up in a rogers store, I don't see any reason whatsoever why you wouldn't just pick it up in the apple store instead, as opposed to waiting for rogers to fulfill the reservation. Plus it reduces the strain on the remaining queue.
Now if you want ship to home/have the cost added to your monthly rogers bill, that's a different story (as you'd have to pay the unsubsidized portion of the phone up front at both the rogers store and apple store)
For people with a corporately paid plan where the company pays the bills, I'm not quite sure if Apple Store can process that though. For people with a personally paid but corporate/business discounts applied, perhaps.