Sounds like a good strategy. You'll just have to make sure you get him hooked with some really good kisses so you can reveal the gluten-free thing sooner rather than later.
I'm glad you mention this! Particularly for young girls to read. It really is true. I think someone who's been your boyfriend/husband for awhile and is persistently not accepting your needs on the Celiac front is a candidate to be kicked to the curb. But I think as we all know, it's hard to accept some of the requirements of this disease... even for ourselves, much less for someone who's never been sick from gluten, much less anything. The idea takes some getting used to and a lot of science talk that isn't very sexy. I'm definitely not going to require a date to be Celiac. If I limited myself to that, I'd die alone. It's hard enough to find a guy that I'm compatible with.
Another thing people who have been in relationships for awhile have forgotten is that when you have only a few dates with each other, there's not much to go on... and you've already been high maintenance around meals and kissing, the prognosis can't look good from the other person's perspective. It's hard to see all the great things past all the toothbrushes and it's easy to ditch out for something easier. You're not invested yet.
So, you're right... and this will be especially hard for teenagers and college-aged kids who are insecure by definition... and whose dating prospects are inexperienced and will not 'get it' right away. Even the nicest guy may not get it right off. I didn't. I need to find the right disclosure plan for dating. Perhaps I pick a place to eat where he's unlikely to come in contact with much gluten when first kisses could be the outcome. Something like Sushi where he's unlikely to have breadcrumbs still lingering.
Edit: I just thought of the perfect plan! Take the guy skinny dipping after diner. While in the water, have a water spitting contest, which will lead to lots of laughter and then some great gluten free kisses. This way his face and mouth get good and clean and he'll be none the wiser The only flaw might be convincing him you don't go past 1st base on the first date when you are already skinny dipping and kissing.