If you're on the U of T campus and you MUST have your Venti frappa-lappa-mocha-toffee-baby-ccino, then this is the place you go. This Starbucks is located on the 2nd floor of the Eastern Bloc-esque Robarts Library; you can't miss it because the line is always about a gajillion miles long. Not unlike a bread line in Soviet Russia. In Robarts Library, Starbucks drinks YOU!
Anyway. Despite the numerous problems that this Starbucks seems to have (sometimes, they run out of mocha; often by 4pm, the pastry case is practically bereft of goodies; most of the time, you can't use a Starbucks Card), I will commend them for being fairly quick given the amount of people waiting. It's still not the fastest cup o' joe by a long shot, though.
In summary: if you have the choice, go elsewhere. However, if you are trapped in Robarts with a quarter's worth of studying to catch up on (like I am doing right now), then suck it up and wait in line -- it's the only place for a latte in the building.