This is the closest Starbucks to my house, so I come here quite frequently.
Basically, all you need to know is they are SUPER slow anytime except the morning. That statement seems pretty ass-backwards, but it's true, in my experience. I've waited close to 10 minutes for my order to be completed during the day, but I've always been in and out quick in the mornings (7:45ish).
I can't speak for the drive-thru in the mornings, as I always run inside, but if it's anything like the inside you should be able to get your morning coffee and still make it to work on time.