Yes, as I mentioned a few posts up.
It's really hard to know what to think of the "gasp" or "hmmmm" bit. Even the op doesn't seem to remember exactly what it was, and a "hmmmm" is not necessarily judgmental... it could simply be her thinking of whether or not to do a follow up test. And I seriously doubt she was gasping out of shock that someone drinks about a beer a day. We weren't there, so none of us know the possible nuances of what happened. Only the op does, but even that is open to misinterpreting.
The fact that this whole thing rests on a particular interpretation of a very brief vocalization says it all, IMO. She really did everything she should have. Can it get a patient on the defensive? Absolutely. But a wounded ego is nothing compared to what can happen if she errs on the side of making sure she doesn't ruffle anybody's feathers.
But what happens if the wounded ego or ruffled feathers in turn causes someone to lie about an even more critical item on the checklist - do you use drugs? "oh crap I'm a freaking junky but if I don't want to tell her that, I don't even want to tell her that I use occasionally soooo... No maim, I'm a clean as a whistle
The person taking the phone interview should be practice enough that they can make that call to follow up on a answer without having to umm and arrr about it. Instinct should kick in - ...6-8 beers a week => "are they all in one sitting? / do you drink more than xx a night? / etc." => all in one sitting => "Do you feel like you are dependent on alcohol or that you could not stop drinking if required?"
As little emotion as possible should be "shown" by the interviewer otherwise it is human nature to feel judged and start calmming up.