Here's the bottom line - no company would offer these extended warranties if they weren't big money makers for THEM. This fact is undeniable when you consider all warranties sold lumped together into one huge database.
Now, on an individual basis, there are countless stories and even posts on this forum about riders who've saved tons of $$$ having a major repair covered by an extended warranty. Luckily for the warranty companies, these are vastly offset by the many riders who bought coverage and never used it.
You have to decide for yourself where you stand on this issue. On the one hand, if you lack the skills or tools to perform the required maintenance, both scheduled and fixing things that break, and you're simply looking for peace of mind, then the extended warranty may be the right choice for you. On the other hand, if you like doing mechanical work and do have the time, tools, and skills to keep up with your bike's requirements, then it might be better to save the money and skip purchasing the warranty.
Obviously, if funds are not a big issue, then the warranty is the way to go. And as has been previously mentioned, if your bike is your primary transportation and you can't afford a lot of down time, then it might make sense also. Just remember, dealers can take a frustratingly long time to fix things, even under warranty.
Allow me one more rant and I'll be done. I simply love it when someone posts, "I got it fixed under my extended warranty and it didn't cost me anything!" How quickly they forget the thousands of dollars they spent purchasing that warranty!
I know I probably didn't give you the clear answer you were looking for but those are my opinions to help you make your choice.