it depends not who is behind the counter, but the people in the
queue itself. if you see auntie/uncle/ahma/ahpek queueing, stay
clear of that queue. but if the queue consist of teenage boys or
youngsters, it will be alot faster. This one from my
experience.
for those aunties or uncles in queue, sometimes they ask alot of
request or questions when ordering. very troublesome. furthermore,
they dine with kids. so you can imagine the time taken for the
order to be prepared. as for youngsters, usually they very chop
chop. i remembered queueing directly behind this lao auntie as its
the shortest line. when its time to take my order, the line beside
mine had already served 3 person liao. 
