Some of the other advantages of a T-Tail are especially applicable to smaller jets. Basically it goes like this:
Small jet> short landing gear> must have aft-mounted engines> this necessitates t-tail
Engines on underwing pods are out of the question due to ground clearance. Also, since the fuselage is much shorter there is less yaw stability in an eng. failure so it is beneficial to have the engines mounted closer to centreline.
I've also read that aft-mounted engines (basically when discussing aft engines a t-tail is a given this is why I bring this up) allow greater fuselage interior space, and a quieter cabin but I'm not sure I can see that reasoning. I am not an engineer, but can anyone sort this out?