We booked a brunch for three people. 48 hours in advance, they "forced" us to decide what we wanted (we had to choose the toast and yogurt we'd be craving two days later).
I'm celiac, so my brunch was gluten-free, for €4 more. Considering I pay more, I think I should have at least the same options, but I couldn't eat the pancakes offered at brunch; instead, I could choose two pastries from the ones on display (gluten-free, of course, a much more limited selection).
The final straw was that my friends had a regular brunch, but since we ordered gluten-free toast for the three of us to share, they charged a total of €12 extra. In other words, they also charged them a gluten-free brunch just for ordering two slices of Bimbo bread (at €4 a slice, it's already worth it). The rest of their brunch was a regular one with gluten.
I think the fact that a restaurant offers gluten-friendly service (which I appreciate) isn't just about having gluten-free options. I think if you offer it, you should be treated the same as everyone else. It's discriminatory enough that you have to pay more for having a gluten-free diet, but if you don't have the same choices, it seems like the last straw. And charging €8 more for ordering something to share is outrageous.