FWIW, never seen those numbers or heard from any customers that get that. We do have 1 customer that stated 18mpg on the highway at 65 mph from Santa Fe to Denver. 23mpg no way.
I'll concede that 23mph may be a stretch and that the honest answer is I'm not sure...
I only drive it occasionally. My wife uses it as a DD and drives on almost completely flat ground from Parker to Littleton. She's that person on the highway going 50mph
I use our FJC and T100 98% of the time. This was going to be the dream expo build but when wifey-poo wants a Venza, guess what happens?
Completely shifting gears: Although we have not met, I'm a big fan of the Slee Jack-off tool set (or whatever it's called)... picked one up at Rising Sun Rally a couple years ago and have touted it on FJ Cruiser Forums many times...