I print using contrast filtration on multigrade papers, the Omega is a condenser model where I use Ilford filters, the Leitz has a multi contrast head, and the Minolta is dichroic color head. The Leitz has a way of removing all of the filters in the light path, and that increases the printing speed by about one stop, compared to Grade 2 filtration.
Normal exposure time for me is between 22 seconds and 64 seconds at f/5.6 with a piece of 8x10 or 11x14 paper. If I developed my negatives to one stop denser (by overexposing one stop and not compensating in development), my enlarger exposures would be between 44 and 128 seconds. That's two minutes. What is so strange about that? I like what I get from fairly dense negatives.