No. The argument was about whether the DP was in any significant way different from what the commercial release of WP8.1 will be. OF COURSE there will be bug fixes. But so many people responded to any problem with 8.1 that "it's just a preview! this will be taken care of in the final release!". Even things like the lack of FB integration, photo hub, etc, MAJOR things, people were like "it's just a preview!". THOSE THINGS WILL NOT CHANGE IN THE COMMERCIAL RELEASE. There will naturally be updates of individual apps after release, and a few polishes and bug fixes before and after it's released as an update. But when Lumia 630 comes out, it will have substantially the same version of 8.1 that the DP had. It was the final release. It was the one shipped for manufacturing. That's a fact.