For most of us that did the course at Old Sarum, the majority of us had only completed (including myself) the tailwheel conversion a couple days before starting the FI course, and I seem to remember getting a reasonble bit of circuit practice during the course. Yes the tailwheel does make it a little trickier but nothing that can't be mastered in the 30 hours. Remember every flight gives you the chance to practice pattering a take off and landing.
Plenty of the FIC course grads at Old Sarum have gone onto teach tailwheel conversion at the club without any problems.
Remember any FI(R) whom has done course on a trike and then completse a 5 hour tailwheel conversion afterwards is legally allowed to teach tailwheel, so if you have completed a whole course on a tailwheel you are alot better prepared than for teaching tailwheel than the legal minimum.