I realize the limited value of anecdotal evidence, especially from cashiers. Some just shrug and say they don't know when they'll work. But when I do get answers, they're remarkably consistent about reported problems.
Aside from Home Depot, none of the stores I've been to in the last couple of months have working chip readers. That includes Sprouts, Tom Thumb, Kroger, 7-Eleven, CVS, or any of the myriad small stores. My wife works in a small retail shop and has asked, and was told that even with the newly-deployed chip readers, they're not likely to be active for several weeks or months yet.
It's not happening as fast as it was supposed to, and that's going to be a problem come tomorrow.