Yep. I used my Mom's a few times to grocery shop for her when she was homebound, and I asked the cashier at the grocery store, who told me to sign MY own name. I guess if there was ever a question about the validity of the charge, when they look back they can see who signed the signature pad and go from there to investigate.
But to be honest, most places would probably never even notice if the name on the card matched the signature on the capture...I almost always use the self check out and pay with the CC, and with the electronic signature thing, the signature I sign never looks ANYTHING like my actual signature. even when you go to a cashier, many times they don't even require you to sign anymore (Walgreens, I mean YOU) if it's under like $50, and even when you do sign, the cashier never touches the card, so how would he even know if the name matched?