The article doesn't mention anything about the weight, so to satisfy my own curiosity I just got a rough measurement of the weight of a spoon head (I didn't remove the handle from the spoons I measured, so instead I let the handle rest on the counter, off the scale). Based on what I could come up with, that many spoon heads would weigh between 1.5 and 2 kilograms. Which seems quite high, and many of the spoons on that outfit look quite a bit larger than the ones I measured (although they might be thinner or a lighter metal).
I wonder if the designer did anything to dampen the noise as well, because that many spoons rattling with every step seems like it would be quite loud.