disclaimer... I'm not abandoning my shopping ban but I'm still deciding on a pair of bootcuts I got from NAS and went to the Rack yesterday to do some comparison.

anyhow... tried on (and brought home) a pair of Cookie Johnson and Paige Premium jeans and the one thing I noticed was how stretchy they seemed. I looked at the fabric content and they both have about 25% polyester, 2% spandex and the rest cotton. They are both bootcuts so it's not that they are jeggings.
I've never noticed premium denim having polyester in them. Is this a good thing? bad? indifferent?