Ehow is a really badly done user-contributed site. In other words, much like wikipedia, contributors are free to make up whatever they want. (I actually block ehow and fixya entirely in google search results, thank god for the blocked sites feature!) I had an island named after myself for a LONG time before anyone actually caught it on wikipedia.
Simple truth is the tundra is a really good truck and pushes the limits of what is defined as a 1/2 ton, but 25,000 on a 5th wheel is an entirely different ball game.