As mentioned elsewhere in this post, the rule of thumb is thus: If a 2 person tent = a loaf of bread in pack size, a 3 person of the same tent = the same loaf + 3 slices. It stands to reason. It really does not take much more material to add 18-20 inches to a two man footprint. For guys venturing off tarmac on enduro types, extra weight might be a factor, but if (like me) you rarely venture far off asphalt, the extra ounces are immaterial. In my experience, the setup & take down times are virtually identical, assuming the tents are the same design.