I don't think Silky_S3 ordered the DA pack though and he got the round one too.
I reckon that either everyone got the round one up until a certain build date, and then after that they started fitting the square one to cars that didn't have the DA pack spec'd OR that they fit the round ones to all cars until stocks run low in which case they pilfer stock from the VW plant and fit them to the non-DA spec'd cars so as not to hold up the production line. Every time we try and establish exactly what sort of logic dictates who gets which sensor someone else pops up with an example that's proves it wrong. My head is starting to hurt!
In any case, as you say, who's going to use it above 100mph in this country anyway? Also the cost of changing them over is about 3-4 times the cost of the original option (?) so I can't see anyone doing that purely for cosmetic reasons.