rocky: "...I do sometimes wonder if 'Everyman' refers to the fact that all and sundry are contributing clues..."
I've wondered what officially defines an "Everyman" puzzle. I doubt that multiple setters are often used; that seems inefficient, difficult to arrange, and possibly more costly for the Guardian. For a long time I thought that Everymans were supposed to be easier than standard cryptics, but I'm not sure that's the case, aside from their typical use of "solver-friendly" grids with many crossers/crossings.
The 2 main "Everyman" characteristics I notice are (a) the solver-friendly grids; (b) some general informality/looseness of cluing relative to other cryptics.
Funny that this week's Everyman generated much more discussion than the (admittedly rather easy) Prize.