We bought a 3 year old TWH mare this past fall. She is a great trail horse.. she was Amish trained and only needed/needs to learn how to neck rein better. We are still working on it. She walks, does a gaited slow walk, and a running walk that are all very smooth.
BUT, she does not canter... I have never had a horse as young as her and have never had one that didn't naturally go into a lope/canter at some point. I know she can, I see her in the pasture doing a faster canter/lope, but don't know how to ask her for it while riding.