My experience has been the opposite. We purchased a cheap black and decker wallpaper steamer for that exact purpose & it has always outperformed the chemicals. The amount of damage done to the wallboard generally depends on how the wallboard was prepared prior to being wallpapered. In the house I have now, in each addition, the wallboard was NOT primed prior to being wallpapered. And, they used the old style wallpaper where you overlapped about 1/2 inch on each edge. Impossible to remove without destroying the wallboard, impossible to cover those vertical lines. So, slowly, I'm gutting room by room & replacing all the wallboard - much quicker than spending hours upon hours minimizing the damage to the wallboard & skimcoating entire walls.
edit: some glues are virtually impossible to remove - chemicals or steamer. Wallboard is about $8 a sheet. Depending on how the wall is joined to the ceiling (crown molding ftw), you can sometimes gut a room & re-wallboard in less time that it takes to get the damn wallpaper off.
edit edit: p.s. Subsequently, I've decided "Screw wallpaper!" I used to enjoy putting it up, but now, would much rather paint.