OK, here's my update:
Doubles went extremely well last evening. Movement was better in every way — getting to net, footwork while volleying, tracking down lobs. No question in my mind that minimalist shoes are safe on the hard courts. I am confident that any tennis player who has gone "zero drop" for running and training will prefer minimalist shoes on the tennis court.
Unfortunately, my Asics Mexicos took a beating in only one doubles session. I ordered Merrell Barefoot Road Gloves, which have a sole designed to run on pavement. I'll let you know how they hold up on the court.
Head Youtek Prestige Pro • Babolat VS Natural ThermoGut 16 Touch String Black • Merrell Barefoot Run Road Glove shoes