Interestingly enough, the Standard of Perfection says they should not be that heavy. I know Suede was 13-14 lb until the last six months of his life, but when you go to that size, you are really over standard, though they do look impressive. The standard is 10 lbs for cock birds in this breed. I think the blues in the British standard are slightly heavier, I recall reading years ago, maybe it was 10-12 lbs? I may be misremembering something here, but I know neither standard allows for 15 lb roosters, gorgeous though they may be roaming our backyards. Of course, Orpingtons are always an English-originated breed, no mater which standard you are using.
The male pictured is that "just right" shade of gold, IMO. Love that pocket watch gold color.