They just want a rough idea of what to expect.
Frankly - you should be able to tell by the pictures of the place, and photos of the actual plates (if they're legit).
That's 90% of right there.
The odd bit of bad service or extra great service I don't think is a huge deal. I've never thought poorly or great of a place because of the service, I always just assumed that was the individual server.
All we ever need is for 2 or 3 people with decent taste to walk in the place, have a taste, take a few photos and 'tell us what it is' - maybe point out what's good, what's bad a little bit.
And then maybe some 'editors choice' for the one's that naturally stand out.
That's it.