If it does not ramp up and down with on and off commands it is an older version. Date Codes don't seem to mean much. As there where earlier ones in 07 that have it and some later 07s didn't. My 07G27s do not.
wazkaren:
Are you sure you read the date code sticker correctly? For many years X-10 has used a date code with a one or two digit year followed by a letter code followed by a two digit number, e.g., Brian's 07G27.
It's not clear whether X-10 located a a supply of the older microcontroller chips and is continuing to manufacture the older design or has backed off and reprogrammed their new microcontroller to have the original characteristics.
For the LM465 units I have, the older design circuit board has a dual inline (DIP) IC on the same side of the board as the other components. The new "soft start" design has a surface mount IC on the back side of the board. If recently purchased LM465 have the original characteristics but the surface mount IC on the back of the board, that might resolve the question.
It'd be unfortunate if X-10 has backed off and reverted to the original characteristics with the new microcontroller for the LM465. The "soft start" design LM465 adds some nice features and it is for the most part compatible with the older design.
(The major problem was/is with the WS467 Wall Switch module redesign, where one particular characteristic makes it incompatible with the older design insofar as control by AHP and other software is concerned.)