There is a fellow at my local shop infamous for finishing an LFD Double Ligero Digger (an 8.5" x 60 monstrosity, and a most potent blend) in like 37 minutes! An impressive feat that makes me queasy just contemplating. Another guy made a big deal for weeks leading up to New Year's Eve a few years ago that he was going to smoke a Digger, which was out of character for him. It must have taken him 5-6 hours to smoke his, and it was pretty obviously kicking his ass. I don't know how long it would take an average cigar smoker to get through a Digger (too much cigar for me!) but I'm guessing it's somewhere between 37 and 360 minutes
Anyway, my usual take is do what makes you happy, but come on.... the only cigars you should be finishing in 37 minutes are small coronas like minutos, perlas, etc., or cigarillos and the like.