I've had Matt, (Harris, Tet, Dor, Mid, 5.5", 20"), for a couple years, and not impressed with it at all. It's never reached 20" and the flower gets splotchy and the scapes barely reach the height of the leaves. If a DL is going to go bye, bye, Matt would be the one. It's too bad because it's a good multiplier and a bud builder. Maybe I'll just plant them in a big pot and keep it on the patio. I hate to toss such a happy, but goofy looking, plant.
Here's a picture of stubby, Matt.