Not sure if this was directed at the Midwest Crab but here goes.
They were 6-12" when I planted them. They grew out of the tubes thier first year. I removed tubes spring of second year and they grew great and unbrowsed until October. Then they got hit hard in short order. I put three foot cages on and they rebounded this year. I am switching my 6' cages to them as my other trees don't need them. No fruit yet but is in the 1/4" size but is consumed by critters.