THERE IS ALWAYS A LINE HERE....usually. The peak times of this Starbucks is around 11 am - 4 pm.
Try to avoid at all costs the times of: 9:45 am - 10 am, 11:15 am - 11:30, 12:45 pm - 1:00 pm, 2:15 pm - 2:30 pm, and 3:45 pm - 4:00 pm.
These are times in between classes, so it's kind of common sense to avoid the hoards of students trying to get their caffeine fix between classes. Usually after 5 pm, most students are heading home and the line should be fairly short. The drinks are fair, but for some reason other Starbucks always taste better and move a lot faster too. If you are desperate and looking for a quick caffeine fix, I would recommend getting a cup of coffee at the POD in the Student Union.