I think its pretty safe to say you drop any car 2" on a decent set of coilovers and there will be noticeably different ride and handling characteristics. I don't think the average person will use the advantages to their fullest daily driving on the street, but there are still advantages. Say emergency stops for example; I know I've had to slam on the brakes a few times to avoid shit in the road and a stiffer suspension has helped me keep the car under control. Instead of the car rolling and diving it stays flat and planted.
These type of threads crack me up because it seems the majority of people on this forum think they are "car experts".