They are. I have a Madone 3.1, I think it came with the same wheels as your Emonda. They're branded something like "Bontrager Race Wheelset" and weigh a lot. Somehow they also managed to go out of true within the first 5 or 6 rides. I already had a set of Vuelta Corsa lites on my older bike that were much lighter, so I ordered a new freehub from Vuelta (old bike is Campy, new is Shimano), swapped that, and put them on.

They're probably a pound lighter than the Bontragers, and at about 180 lbs I don't notice any flexing. 1 spoke broke in a race crash, another on its own, but that's in about 20,000 miles on these wheels with some bad roads. Great wheels for the price. I will say that I've had problems with the freehub. I guess a few too many rain rides degraded the cartridge bearings in the freehub body, and like others mentioned, my Ultegra 6600 cassette gouged the splines pretty badly. I ended up replacing the freehub entirely because you can get a new one for $45 online and the old one was making an intermittent grinding noise under load.

I know someone will chime in and say a truly high quality wheelset should last through some rain rides without needing a $45 replacement part, but when you pay $220 for a set of wheels that feel great and lighten the bike, there's gotta be some downside and I guess that's it. Still, if you're handy you can replace the freehub and front/rear hub bearings with a kit of higher quality ceramic ones for $30 and probably avoid that problem in the future. I just didn't have the inclination for that. I also got a backup rear wheel and cassette to use for future rain rides for $10 from a friend, so I imagine the Vueltas will last thousands of additional miles for me.