kinda funny how you mentioned teflon. i put too little at first and the fittings were leaking. I may have overtightened the brass parts to stop the leak. The leak never stopped! I took apart all of the fittings and wrapped the threads w/ more teflon, probably 7 times. Now there's no leak. I had to use the water even when it leaked, so at first, I thought the slower shut off faucet was caused by the leak. But now that it doesn't leak, it's doing the same thing! I'm sure that the slower shut off wasn't present before.
I'm also not understanding the "debris" concept, only thing I can think of is that the debris in the piping would cause a pressure change, which results in the slower shut off, but then again, everything else works except for the kitchen faucet. The kitchen spray works as well. The debris wasn't directed to my issue, it was soemthing that was said over the internet if you search "slow faucet shut off" on google. thanks