Funny as you like today to watch the locals trying to get their heads round the concept, in the 20 mins I was there I would say 95% came into the McCafe to order their food and then take away. Others were actually using the drive-thru then getting off bikes/out of cars and eating the food in the McCafe
In my experience the Thais tend to remove the one redeeming feature of farang fast food ie. it is fast meaning not long to wait, but in fairness it was all good today and no doubt I will go back.