we had one girl in our party and it took her at least 5 hours to get down, maybe 5 and 1/2. no fault of hers, it's just a long trip up and back, you're tired, the backpack is killing you, and the adrenaline from summitting pretty much evaporates in that last couple of miles from outpost.
i mention that in case "buttercup" is not a guy. if "buttercup" is a guy, well, this is california!
it took me and another guy less than an hour from trail camp to outpost but we were practically speed walking, and it was downhill. at that point, we waited for the rest of the party. the going went slower went it got dark and we were doing headlamps. and the spring in your step is pretty much gone by then.
if buttercup is in good shape, i think the earlier post of 3 to 3 1/2 seems reasonable but I would give yourself plenty of time just in case a strap breaks, you want to take pictures, or something else comes up. enjoy the trip.