Sure we can talk about it here. I was wondering how many people actually have an SRM or PowerTap? These are the only devices that measures actual force on the crank or hub and integrates with respect to time in order to come up with power. All the other devices do not measure force directly, but rather tries to calculate it using road-speed, road-grade, RPMs and calculate force using user-inputed data such as weight and riding position. But they are nowhere nearly as accurate as the SRM and PowerTap, so I'd relegate them to being about as useful for training as the odometer (slightly more useful than the clock).
And you'd love cycling even more when you're kicking @ss in races!
A regimented training-programme will get most people to within about 90-95% of their genetic potential in 2-3 years. I don't have any data on those who just goes out and rides, so I can't compare. But I'd surmise that those riders improve at 40-60% of the maximum rate possible, or reach that same level in 4-7 years maybe?