Emer mentioned judgeing battles by size (i.e., small, medium, large, huge). All that tells you is the size of the map (which is very useful to know). For all you know you could have a "huge" scenario pitting one sniper versus another. The "size" of the scenario is only the map size. That's why I like to see the points (or rough aproximates to preserve FOW) mentioned somewhere. The point system is not perfect but along with the scenario write-up it gives a pretty good idea of what type of units, no. of units etc. that are involved. Without point totals I often have no idea if the scenario is 2 or three battialians in size or if it is one company in size).
No info on point totals combined with general/vague scenario write-ups such as:
"German battle group opposes Russian Guards Infantary Division near Minsk."
provides little information in regards to scale.