Apples and Oranges. Can't compare a traditional TT to a toy hauler.
The TH in question lists GVWR under 7500lbs and light dry weights of 4k and a tongue of 450lbs. The poster doesn't plan on putting heavy toys in it, just bikes and beach balls. The usual for most campers. If this is truly the case then he won't likely be anywhere near the GVWR and the tongue weight will be well under 1k. No reason for it not to compare to a conventional TT. It will haul very similar and the Tundra will have no problem with it.
Agreed that it will be a different situation if he actually planned to use it to haul heavy toys, but this doesn't appear to be the case.
