In the past i've been in interviews lasting an average of 20-30 min... even in consecutive, going-on-to-the-next-round gigs....
but lately ive gotten super quick like get-through-them-all interviews with 2-3 questions for 2-10 minutes!... and im on the 5th interview with a company
how could you possibly analyze a person that quickly?... wouldn't an employer want to be more through?
just my 2 cents