It's strange that they found this staggering when you consider how much contact there was between the northern Europe and the Ottomans.
I think that's mainstream journalism hyperbole. From what I've been told, those guys went everywhere they literally could and brought back whatever they could. They went as far east as Russia, as far west as North America, and they loved to bring back exotic coins, jewelery, etc. When you consider the fact that the Silk Road covered more ground and was a land trade route that existed about a thousand years before Vikings were even a culture, it doesn't strike me as surprising that Vikings got their trade boogie on as much as they did.
I posted the article more because it interested me in two nuanced ways. One, due to the nature of the material, cloth artifacts that old in good, studiable condition are kind of rare. So discoveries that involve more organic materials, such as cloths, woods, foods, etc. always strikes me as extra nifty. Two, I've read that Vikings in particular were actually pretty open to other cultural ideas. More often than not people talk about language in particular and then mixing up Christian ideas with old world pagan ideas from a few different cultures, so to see mention of something other than that, even though we have other examples of Viking interaction with the middle east, is kind of cool.