Not all arguments from expert opinion are fallacious. In this case I think that those authors are recognized, themselves, as excellent prose stylists. Therefore it's reasonable to accord their opinions more weight than the average person's. If I'd said something along the lines of "Dan Brown says Proust is a master prose stylist and he's a writer..." then you'd have a point. Also, they are pretty representative of the critical consensus on Proust's particular strengths. Finally, they all happen to have written on Proust and what they like about him, some of them quite extensively. (Sadly, not all of it is available online. John Updike penned a very nice piece years ago on the ways Proust shaped him as a writer and the difference he found reading him first in the Moncrieff translation and then later in French; doesn't seem to be available anywhere.)

>> Well, arguing about literature never really leads anywhere.

A problem with the inherent subjectivity of art in general, I suppose. But nonetheless, it can be an enjoyable past-time if kept civil and respectful. Anyway, I appreciate you explaining what it is that you don't like about Proust, even if we don't see eye-to-eye.