Dan Daniel
Subscriber
My 500C/M weights 1637 grams
My Medalist II weighs 1351 grams
They don't feel that different in use. ;-)
The ELX is over 2600 grams. That's with an NC2 prism; with waist level finder it is 2400 grams. So... uh... yeah, that's different from a Medalist, a Rolleiflex, etc.

Just for fun, did you know that the Texas Leica, Fuji GW690 series, weighs a few ounces more than a Medalist?