Just wanted to hear from some more experienced ears than mine on this

I've always setup my speakers to where the tweeter level is around ear level. But has anyone noticed a huge difference if the tweeters are a little higher than that? My current setup has the tweeters about 4" above ear level and the upper mid driver is around ear level. I don't hear a difference if I raise up a little bit and make myself even with the tweeter, but I'm just curious if anyone thinks that having the tweeters higher is a bad thing.