I understood you. My apologies for any confusion. Some of the data wasn't transferred (for example: last visit date, default time zone for posts). I had the same issue (my timezone defaulted to GMT after the transition).
The note on how to how to change it in the reply was for the benefit of other members reading the post (so they'd know how to change their timezone from the default of GMT, and they should see the timezone being used at the bottom of each forums page).