I believe I got mine from Lynn when I visited during the perennial plant sale last September. The rosettes appear to be on the smaller side, although I have only had this plant since September of last year. Still, that's plenty of time for them to have sized up.
I guess I too have an impostor. Let's keep after 'em.
Mine looks very much like the July picture Chris posts on her Cubits store.
It also bears a striking resemblance to my 'Bronco'.