In the past I would have said "this" but I've seen a lot of people declining good offers for better ones that never materialized. Be careful playing chicken if you can't afford to.
With the amount of scatterbrained recruiters out there these days, what kind of magic does one pull to get multiple offers to appear so close together?
College recruiting can make this happen. Granted really only for new grads but it is totally normal in that setting to get multiple offers within a week or two of each other.