Pretty close to the mark, Matt. The Taimen isn't a trout technically (if there even is such a thing), being a species in the genus
Hucho. But that subtle point may be moot as it is reportedly the largest salmonid in the world anyway. Nothing even comes close by length, though the Chinook can rival it in weight. Check this out guys!
http://fishingtours.corcon.eu/en/New-Record-Giant-Taimen-on-Fly-Fishing-Season-2010.aspx
Hopefully Jason and others will weigh in on just what is a trout by definition. The topic is clear as mud. The common name Taimen is attached to its own genus, as are the names Char, Atlantic Salmon, and Pacific Salmon. On the other hand, "trout" as a common name is now applied rather loosely to many species in the latter 3 genera. Since the cut and rainbow were moved from the genus
Salmo to
Oncorhynchus, a lot of confusion has reigned because prior to this it was generally understood that trout were in the genus
Salmo except where the name was incorrectly applied to some of the species in the genus
Salvelinus (Brook Trout, Lake Trout). I grew up with the notion that a Brookie wasn't a "true trout but rather a char." In the current nomenclature, it seems to me that Brookies have as much claim to the name as Rainbows or Cuts since "history of common use" is now the guiding principle. Genus is apparently no longer the "cut" off.;)