I plugged my phone in (with full battery) and about 20 minutes later I was updated. About 3-5 min to download, 5-7 minutes to install, and 5-10 to boot up and finalize.
It takes longer to boot up than it does to download/install. So, don't freak out but it will hang on the giant S "Galaxy S" screen for a few minutes longer than normal. But after that the initialization of the OS after boot (IE: Widgets, Media Card scanner) is much quicker.
I tried using this, but when Io plug in my phone it says "unregistered device"...its not rooted, unlocked, etc. I can't help but wonder if it is because I got that "bad" JI5 updated that showed up online then go pulled. Any ideas anyone?