I know I'm late to the party but my $0.02:
1. WRT the tow ratings - color me skeptical. I can't help but think they pumped up those numbers to try and make the vehicle look more capable than it actually is. Maybe tow 7000# across town. Through the Rockies? I sure as hell wouldn't. My '07 4runner struggled badly pulling a mere 2000# of travel trailer through the Rockies and it was "Rated" at 5000# towing capacity. Hell, even driving across flat North Dakota in heavy rain the 4runner struggled against the wind and got an abysmal 9mpg while doing it.
2. WRT the 5' bed, I don't know about other neighborhoods but here in my suburban CO neighborhood you can't swing a dead cat without hitting a dozen compact pickups with 5' beds and half ton pickups with 5.5' beds. Like it or not the market has spoken and it seems to have said 5' - 5.5' beds are fine. I'm not sure I understand how a half ton with a 6' bed is a "real truck" but one with a 5.5' bed isn't? What magic did that 6" of bed add? In any case, I don't think the Gladiator is intended to be used as "just another pickup" anyway, it's more a separate category of vehicle altogether, the "recreational sport truck."
I think the same could be said for most compact trucks with short beds - they aren't really "pickup trucks" so much as they are body-on-frame SUVs with an open "trunk." With the off-road-capable BOF SUV all but gone from the US market (Toyota and Jeep seem to be the last ones standing in the mid-sized segment and GM and Ford seem to have turned the Expedition and Suburban/Tahoe/Yukon into glorified mini vans) the short-bed crew cab pickup seems to have filled that market segment.