Yes, there are many that have a good suggestion for weight removal with aftermarket parts like those, but I like having a stealthy factory look and it leads to having to look in many other places for an ounce, a pound or more. People have for years looked over, through out and under the car and have not seen the unseen. It's a fun game more than just taking weight out the obvious way.
I do agree though, that aftermarket brakes do shave off a lot in one lot.