This location is super slow. I have been here a few times and it's been a carbon copy of the last.
I have never gone through the drive thru but I'm sure they cater to the window first and maybe this is a prime reason for the slow walk in experiences.
I now have a workaround and just go across the street to the frys Starbucks inside which has been much quicker and I haven't had any issues (friendly staff as well).