The list of foods in the article sounds fine for modern tastes (apart from the snails maybe). I'm sure it would have been prepared very differently, but that never stopped us calling things "Chinese food" etc in the west.
I once collected a quote from a writeup on dailywtf, an aside that went:
"I should mention that I mean real Chinese food, not that non-deep-fried stuff they serve over in China."
The intended joke, obviously, is on people who think the American label "Chinese food" must reflect something similar to the food they have in China.
After spending years in Shanghai, eating local food, seeing the ads in bakery windows for "FRIED COOKIES", I still find the quote funny, but mostly for the idea that they might serve non-fried food in China. There is some, but it is most certainly not the norm.
Almost always prepared "French style" with garlic-butter sauce which kind of masks the true flavor of the snail. By themselves the snails have a mild vegetative flavor with a bit of umami.
The only other preparation I've heard of was pickling. And also in frittata (omelet). It would be interesting to know how the Romans prepared snails.