Somehow, everyone knew. This thing crinked more necks than Kate Upton. I got a "Dude, nice bike," comment every few seconds. I caught an older woman, likely in her 70s, checking it out. Is subtle the new loud?
Of course, there were a few things that might have tipped them off. When the Shimano Dura-Ace Di2 drivetrain shifts, it makes a robot noise and then self-adjusts. Sure, it's only a matter of time before Skynet takes over the drivetrain, but I never messed with it—it was completely no-maintenance.