Being honest, you are always better off with a road bike or a hybrid in terms of comfort, not to mention carrying capacity, for touring. Folding bikes are heavily compromised and designed for shorter distances rather than touring. The fold is usually useful for storage, whether it be in sheds or boots of cars. Plane travel is a weaker point - if you take a large folder in a nicely padded case you might as well take a hybrid or road bike.

My Brompton is used for the daily shopping run or for overseas travel/touring. There will be less of the overseas travel with it, now that I have the Neo which is a better bike to cycle distance with, it being considerably lighter than the Brompton.

Just to restate something the fanboys don't seem to have understood: I am not looking to buy a new folding bike so no suggestions of alternatives are required. Neither am I overly concerned with speed, I used Strava to provide some kind of meaningful comparison, and was surprised enough at how well the Brompton performed to post this thread, thinking it might be of interest.