This is the first I have heard of an actual number that unplugging the sensors puts it in. I also doubt it is consistent since the bikes are so differ in the way they act.
If you want a HD you should have one, be happy. If you want actual numbers, find a dyno tune, or get a controller to put the A/F ratio where you want it. Plenty of things out there. Unlike some other MC companies, Vic doesn't sell you a bike with the intention of "upgrading" it. It is very rideable and has the gumption to go without telling you that you "need" to upgrade before you start it for the first time.
You'll have to pay for it anyway, so figure out the controller you want and go for it, or leave it alone and see how it does.
Some people go their whole life wondering if they made a difference, Marines don't have that problem.~ Ronald Reagan
2012 XCT, AFR+ Gen 4, Lloydz air filter. I don't equate noise with power.
I ride with the Force.