Actually I consider around 20 seconds the exposure I like to have. It allows a little dodging if needed, although that could be worked around with two exposures. When I first tried to make small prints on my return to B&W darkroom work I was getting times in the 5 to 10 second range and ended up buying a neutral density filter. With some timers it's difficult to make very small adjustments in exposure when the times are very short. Over a minute can be a test of the patience, but I wouldn't think much about it until it got up to four or five.

Now if I were trying to make a production run of 250 prints by tomorrow morning, yeah, 55 second exposures would be annoying (but if I ever agree to do that, please deliver me to the old folks home!)