Are there other ways in which Bromptons are good for a shorter rider?
Bromptons have a low standover height and shortish reach (but this varies depending on the model). In addition, the seat can be moved closer to the bars with a seat pin adaptor and the bars can be rotated, but not significantly.
If you found the S-Type bars too low, you could always stick on a 25mm riser bar - I don't think this will foul the fold...