Atlas and standards don't seem to get along very well. There are some well established standards for truck bolsters and coupler mounting holes in O scale, but Atlas, in their infinite wisdom, chose not to follow them. I wouldn't expect them to do any better with standards in any other scale.
Does G Scale even have any standards? There's 4-5 different "scales" that all run on the same track gauge.
Rusty
i'd like to think that more people use the term "G scale" out of a "i just don't care" attitude rather than ignorance about the hobby. there are likely people who would be ok with running a 1:20.3 scale train behind a 1:29 scale Big Boy (if they could only couple ... ). after all, they both run on the same track, right? unfortunately, the industry has also adopted this policy of advertising everything that runs on 45mm track, G scale, i imagine to get the attention of this crowd who likely have no idea what the more precise terms mean.
LS... Large Scale that runs on #1 gauge track. 1:32 is the far more accurate scale, but there is too much 1:29 out there to completely ignore the fact that this would be the closest scale. LS mostly represents equipment that runs on US standard gauge (56.5") track. it is the NMRA catch-all for scales that run on #1 gauge (45mm) track.
this is also what the OP is probably talking about re: Atlas seeing they deal mostly in standard gauge equipment. i have heard that the term "#1 scale" is also a term specifically referring to 1:32 scale on #1 gauge track. '3/8" to the foot' is an alternate definition of 1:32 scale.
Fn3... a bit more confusing. F scale is the NMRA designation for 1:20.3 or a scale that would treat 45mm gauge track as 3' in full scale. that's where the "n3" comes in. F scale running on 3' narrow gauge track.... Fn3. (compare On3 or HOn3). this is more of the typical garden layout featuring many of the well known narrow gauge lines, D&RGW, Sumpter Valley, a number of logging roads, etc.
so it's really up to the people who continue to promulgate an overgeneralized, meaningless term.
cheers...gary
[edit: 1:32 is 3/8" to the foot, not 3/16"]