I don't think it is a false statement. Sure, the water becomes hot quicker than it is for the first shower, but not as quick as a normal water heater. But this could be due to making adjustments as well. It seemed I had less control, it would get cold for a second or to even when I was still adjusting on the hot side.
Apparently waiting a minute or longer for hot water is "normal" on a tankless from what I have been reading, so I don't think it was under performing. It was also the first time the washroom was used that day.