I've noticed the same thing, but over the years rather than just lately. I actually prefer the fabrics I bought in the 1980a and early 1990s. Their hand, to me, held its shape better and didn't pull out of 'square' as easily as today's fabrics seem to. There have been times I have felt new fabrics at the LQS and said to myself, "That's not 100% cotton," only to read the end of the bolt and find that is IS marked cotton. They felt 'sleazy' to me. The weave seems different, or maybe it's the thread count....I just don't know.
Jan in VA