I'm not native to Upstate SC - but, I've never seen so much sleet/ice in my life - I live about 2 miles north of the infamous Upstate I-85 winter dividing line - I've witnessed winter precip change from snow to sleet to rain and back in a matter of minutes!
Some memorable winter storms (as you mentioned above):
Devastating Dec 2005 Ice Storm - lived near Walhalla/Lake Keowee, SC so not significantly impacted but my SIL family (from Greenville) had to live with me for one week (due to no power/tree damage)
Thundersnow March 2009 (lived in the snow desert of Simpsonville at that time but that area was bullseye for this storm) - last time I witnessed thundersnow was the incredible Winter Storm "93 in Alabama
Snow Storm Jan 2011 - rec'd 6+ inches (don't recall exact amount, but heavy amounts/very powdery) - then rec'd sleet/ice several days later - fantastic storm!
Back to Long Term Discussion...
Anticipating the Arctic Air for Tues/Wed and lows in the 20's - I've lived in TN/AL and will enjoy seeing family/friends experience November snow (sad no snow here, but expecting some CAD events this winter)