For the British, a lot of people are going to tell you that the Fusiliers, Lights, Highlanders, and such are "Elite". Sure, they were sort of given "Elite" status, but the reality is that it could be any British unit. Some of the British Line (Regular) units have a history of outstanding conduct on the battlefield and so can be passed off as "Elite" in a Lasalle game.
This doesn't only apply to the British Army. This goes for all Napoleonic armies, in that some Line (or Regular) units appeared to be more "elite" than normal. But it goes both ways, in that some Line (or Regular) units appeared to be inferior or more shaky than normal.
The short of it is this, don't restrict yourself to only black and white clarifications. There are some gray areas that a gamer can have fun with.