During my first fitting appointment with my fitter (three seasons ago now!!) he basically measured up my feet and commented that I'd probably end up in junior race boots eventually. It's a bit hard to source the true narrow ones in small sizes on-demand in NZ though, they generally need to be ordered from overseas with a very long lead time, so we did our best with what was available in the country.
That's cool to hear, from my own measurements the balls of my feet are around 84-85mm wide, so if you can fit into a 92mm boot with no work needed (and in fact with aftermarket liner still necessary), I imagine I'll be able to fit into whatever my bootfitter orders for me with minimal bootwork.
All I know is that my 98mm boots are way too wide, I've only made them work for so long through the magic of zipfits!