Thanks Calvin. My dealer in China (dc-stuffs on eBay) tells me, and I quote: "the only modification of the current batch of C2680T tripod is the 1.5-2cm shortening of the center column, other specs. are the same". This can't be accurate as the extended height of the tripod remains the same, at least according to DC's measurements. That means one or more of the leg sections were lengthened by an equivalent amount. I don't think DC measured the 2nd, 3rd or 4th leg sections. But the effect is clear in Calvin's pic above: The folded legs are no longer parallel to the center column. However looking at this, and comparing it with the current Gitzo 1542T I would still choose the C2680T over the Gitzo as Calvin has done. Parallel/not parallel is not that important to me.
Having said that, and to get away from the minutiae of the small differences in measurements, I really think this modification to the spec is not an improvement. According to DC the modification was a result of customer/marketing input. But when you consider this tripod has a very wide and strong main casting spider, plus very beefy vibration-resistant legs, it's already bulky in comparison to the Gitzo. So now we have this larger diameter at one end of the tripod because Benro has shortened the column. Calvin demonstrated this with measurements at the ballhead end in his thread. While this change wouldn't dissuade me, it could deter others. Bulk (diameter) is as important as length in the selection of a travel tripod to some people, and this change hasn't helped that. At all.