Duane, please correct me if I am wrong but I think the Burl Cocoa leather on my bar stools is a pull up leather.
If so, the bar stool below has been used on a daily basis by a teenager for a little over 4 1/2 years at a breakfast bar. Any spilled food and drink was wiped up immediately (or within a few hours). To date, there have been any stains on the leather.
I hope this additional data point helps answer the question, "how does pull up leather look over time?"