I’ve not weighed an XL yet, but Post Office scales weight of the large is 4.9lb, so the XL will be a touch over 5lb based on having a bit more tubing all over. The sizes/wall thickness don’t change large to XL so it won’t be much.
TBH I was aiming for a little lighter than that. The prototype had a smaller, lighter top tube and head tube and came in around 4.6lb, but the top tube wasn’t stiff enough for my liking and I wanted the zero stack top cup (and matching 44mm all the way through head tube) to keep the bars down to ensure good handling potential, so had to creep the weight up to make the ride spot on. Was worth it though, the 2nd prototype in the production layout was way nicer to ride than the first proto, and I’d really like the first proto!