Originally Posted by
Iride01
It might be a bounce in the current production of bikes where they went too low for the current technology and materials being used and the real world "testing" by the consumers had enough failures (warranty repairs or replacement) to cause them to beef up the frames more on later bikes. As new manufacturing methods and materials become better and more cost effective we might see that trend change and continue to bring frame and over all bike weight lower again.
That’s an extremely unlikely explanation ie 0.5 kg extra weight on the same frame!