It's not that they are over weight, it was just meant to be a slightly humorous title.
It's not that they are overweight it's just that now days because of the bull that companies have instilled in people over the years that has created the fashion for big bats people are wanting big bats that weigh 2-7, 2-8,2-9 mark so that means when you handle and press a cleft for a standard short handled bat to hit the 2-7 mark the cleft at that stage needs to be at least 3-4 as you take a pound out. A lot of the Asian bats that have been used by professionals have been super dried so they look huge but are light, but brittle. It doesn't matter to a professional as he gets given bats, I don't reckon the general public would appreciate going through a bat every month at £300. In fact I wouldn't appreciate it as a professional as I want to keep a bat that is a gun. So these clefts are just the ones that are heavier no difference in quality just heavier as people have dictated it. If people wanted thinner bats we could take more out of them to get the weight for sure.