I was thinking about this recently. The central portion of Eglinton has a very different mode share compared to Sheppard for instance, it is more split between public transportation and cars. The suburban automobile mentality is not as prevalent and people here are more willing to take public transportation like in downtown. I think the biggest detriment to more upper middle class people from adjacent neighborhoods from taking the subway are the present buses. Subways may be clean and great, but buses tend to be associated with dirtiness and well.. the proletariat.
I think more people, especially from the nearby neighborhoods, would be willing to take the Eglinton LRT when it opens over the present buses.