I disagree that people "won't notice". They totally do. The other day my gf (medical field professional, not a "techie") was looking for a good restaurant to go to and, completely unprompted by me, blurted out "OMG why does every freaking restaurant website look the same!?!" (she couldn't keep track of which restaurant was which among her open tabs.)
I think more people notice than we'd like to admit. There just isn't any direct way for them to tell us about it.