A few years ago, when I re-entered the shark infested waters of adult dating, I was looking for a way to evaluate the caliber of potential dates. I came up with The Mr. Bubble Test which is "Would I like to spend an evening with this guy, or would I rather have a nice soak in the tub with Mr. Bubble?"
So, when Lynne refers to Mr. Bubble winning, she means that upon learning a bit more about The Greek Dude, she's decided that he failed The Mr. Bubble Test.
I mean, look at him---cute and cheerful, ready to scrub my back. He's tough to beat.