Nope. They did say they had also done things to lighten the bike,but in the first sentence they def said the 6spd setup is lighter than the 5spd.

I do remember reading somewhere about the weight savings,so combined with the response from Brompton that pretty much clinches it. If you disagree,fine,but you're arguing with Brompton,not me. I consider the company who makes the bikes to be the final word.