Yes I think the Swift is a fabulous multimodal folder! I ride 13 miles each way into Boston. The Swift is nearly as fast as my road bike (extra 2 minutes); I can't imagine a Brompton covering that kind of territory anywhere near as quickly. BF probably but for more $.

When it's blizzarding outside, I hop on the commuter rail and come home that way instead. It takes 10-15 seconds to pop out the seat post, fold the rear wheel up, and turn the handlebars sideways. It's a nice narrow fold, especially if you use quick-release or folding pedals, and leans up against the wall of the train and out of the way. A frame that bends in half would actually be more awkward for the train I ride.

That said, if you're trying to get on a bus then a narrow fold may not be what you need and you probably want a bike where the frame bends in half. But you are going to sacrifice ride quality from what I hear. (Btw, there is nothing more fun than blowing past people on your Swift when they think you are riding one of those "toy" bikes.)

The only thing that really bugs me about the Swift is having to relocate the seat post after a fold so you have the right height and so the seat is straight. I think BF has a better system. So that might be a concern for a multimodal commuter (I don't take the train all that often). What I've done to address this is mount a frame pump on the seat post so that I insert the seat post until the frame pump barely touches the frame. Works great.