From this thread it is pretty clear that Wetherspoons pubs vary about as much as any other pubs. That's largely because of the way they've mostly gone in for taking over existing buildigs which were previously used for very different activities.

In our case in Harlow they took over the old labour exchange, and it's now a pretty useful sort of pub. One end of the building there's the bar, which is noisy enough at times, but in a pleasant way, with a varied bunch of regulars. Friendly barstaff, who know their job, good beer, and, yes, a flat screen for the footy. Up the other end there is the eating area, with sensibly arranged tables, and a wall full of books you can borrow; and it's quiet enough to be able to read them, or have a conversation. No live music, but then no canned music either. Civilised.

If I compare it with most other chain pubs I've come across, it compares very well, and so do most of the other Wetherspoons I've used. And they all seem pretty different from each other, apart from the rather samey menu, and the low price of the beer.

If I wanted to have a go at modern pubs, there are a whole lot of other targets I'd aim at before getting round to the deficiencies of Wetherspoons.