Unlike most of the food places in Pearson, this A&W prices their food pretty close to what you'd pay elsewhere in town: not cheap, but not $15.00 for shrink-wrapped artisan dreck, either.
The pricing probably explains the huge lines, apparently at all hours of the day. The staff were working hard (and I saw reinforcements arriving), but they just couldn't keep up with the demand for food (or cleaning the tables). Other food joints take note: if you're hurting from a lack of business, it just might possibly be because your pricing is hurting your customers. Just sayin'.
For somebody on a low carb diet, there were three relatively safe breakfast choices (as long as you have a travelling companion on whom you can foist your hash browns and toast -- or you could possibly ask them to hold the carbs when you place your order, although I don't think you'd get extra proteins or fats in exchange).
If you're patient, you should be able to grab a seat, although it's not going to be a quiet, relaxing dining experience. (Granted, you won't get that in the pricier joints, either, given the constant announcements to tardy passengers to get on the plane before the airline throws out their luggage.)