Not surprised - have you ever been to Linköping???
Obviously these people had a fair bit of time on their hands to do this research, and good on 'em.
...BUT ...if you'd ever been to Linköping you would know why! I went there some years ago for an interview. It is the dullest, flattest, most barren, and dullest (have I mentioned that?) place I have ever been to (image the north pole with tufty grass).
I didn't get the job. Mostly because the agency completely failed to match what they (Nokia) were looking for with what I did, but I'm sure my complete lack of enthusiasm for the place showed through too! The idea of working in an Ikea showroom (I kid you not) gave me the willies too :-)
Odd thing is, some years later, I met some Swedish people in Germany who went to Linköping Uni, and they reckoned it was a swinging place! So, what do I know? Either that or there are two places with the same name.