Oh man… you're light years ahead of me right now anyway!
And I did check the FAQ for the LT, and it really does seem to indicate the same thing that the other replies to this topic say; that is, the Performance Mode is only considered necessary on the LT because of the lack of the scribble strips.
For me, a man of, shall we say, "distinguished vintage", the Performance Mode display is very appealing (older eyes). Is there a "codger" emoticon on this forum? :D