Serious Eats - seriouseats.com

The quoted text (paragraph 36) would actually help Gristede's rebut a claim of consumer confusion.

It's still ridiculous though . . .

This drink is one of my all-time favorites. It definitely needs a good, natural grapefruit soda -- Fresca, as much as I like it, won't do (esp. artificially sweetened as we get it here in America). Ting works great if you have any trouble finding Jarritos.

As for the tequila, I'll disagree a bit with Paul here. For drinks like a Margarita, 100% agave is a must. For this one, seeing as how you're mixing with a very sweet soft drink, I don't think it's necessarily required. A good quality "mixto" like El Jimador (made by Herradura) works great and is in fact the way Palomas are usually made in Mexico. If you want to use a 100% agave don't let me stop you, but honestly this ain't the place for anything remotely expensive.

Finally, as Anita over at Married...with Dinner notes, a nice big dash or two of Fee Bros. Grapefruit Bitters really brightens it up. I also like to add the salt at the very end, sprinkling it over the ice at the top of the finished drink.

Cheers!