You won't find any examples after 8/25/14 because if you transfer a UDP line's upgrade now and upgrade on a basic line, the basic line's contract won't be extended nor will the basic line be subject to the $30/mo 2yr data plan commitment. As has always been the case, the UDP line will have it's contract extended and now in addition, it will have the $30/mo 2yr data plan commitment so you WILL be kicked off of your $29.99/mo UDP if you do a transfer now.
Call Verizon to confirm. Best Buy confirms this, too. Or take one for the team and try it yourself and let us know what happens.
Calling reps for confirmation is never a good basis for anything. As we all have read and from experience, including any rep during any upgrade process usually ends up with your UDP removed or "lies" regarding that you'll lose your UDP in some way or another. Now not all reps were out to get your UDP prior to 8/25 but majority of them would tell you otherwise, which is one of the reasons why people do not involve any reps.