I live about 20 miles from Charleston and don't see many E90s - maybe 15 in the past 6 months.
I don't live near the "upscale" neighborhoods, but still not many around there.
I did see another SG 325 while driving across the Don Holt bridge yesterday. That was the first time I was able to drive alongside an E90, let alone another SG! I pulled up next to him to catch his attention, but he wouldn't acknowledge me.
