Well, wjknobles and Jac (and at one point LVX) are UT instructors. They are both good at what they do, and the better aspect to taking the UT class is that you get more out of it than you would most shop classes. Most shop classes you get (someone correct me if I'm wrong) around 10 hours of classroom discussion and approximately the same amount of pool time before your OW checkouts. As for UT, you get somewhere in the ballpark of 12 lecture sections (each around 1:15 minutes or so) and around the same amount of pool labs. The facilities at UT are also one of a kind to learn in, and Peter Oliver is a very knowledgeable instructor who has literally written several books for NAUI. I recommend the class for those who can afford to take their time and learn more than the NAUI / PADI standard. And to answer your question, YES, the instructors at UT can teach private classes, but it's up to them as to when, where, and how much.
On the other hand, some shops do a great job at teaching students, too. I'm sure Mack knows a thing or two about putting courses together, and has competent instructors. Shop classes are nice for getting something done quicker than three months, and can usually be tailored around a schedule. Another pro to a shop class is that it's usually all included (since at UT you have to pay a fee to do your checkout dives, thanks to the big heads and their wanting to skate around the insurance policy).
Whichever you choose, just remember, she'll get out of the class what she puts in it.