Yeah, really, don't go by the websites, figure you gotta add 3/4 of a pound for pedals and water bottle cages at least. All those pro bikes that weigh under 15 lbs are top of the line frames, top of the line components, and tubular wheels/tires. Harder to get there with Ultegra, clinchers, etc. Hey, I have a pro bike (top of the line Foil frame), 10 speed Dura Ace Di2 and Dura Ace 9000 brakes, cranks, relatively light Williams 38 clinchers (with a G3 Powertap hub which is also pretty light) and that bike is 16 lbs, not 15. Zipp 404 tubulars would shave about 200 grams or so, I'd still be over 15 lbs. I'd have to save the other 200 grams with parts I don't want (like a less comfy saddle and/or handlebars I don't want or Sram Red which I really don't want).
I have Sram Red on my rain bike. I mean the **** works, it's real light, but given a choice of what to ride, I GREATLY prefer Di2. No comparison. You ride Di2, it wrecks you for all this other crap.