It's just different. There are certain things I do online that wouldn't wash in an offline match & vice versa. In my case, at least with LR slowness/lag don't start to really creep up unless it's more then 4 people in room.
Even on a 5 bar connection, offline is still the way to go. Especially if you play on monitors used at tournaments, the response times are different. Things you can get away with online, you can't offline. Don't habit yourself into using online tactics offline, it won't work.
Ok, but say there was. completely no lag online, and you would just be comparing the speed of how things look with offline. Is online faster looking in that sense, or is it just fiction?