Berlin---If you look at the single rear pivot on the Birdy it is barely below the chainline. They moved it up significantly from the BB. to cut down on pedal induced bob.

You are right---The road bike world just "discovered" that narrow 150 psi tires have more resistance.

Even with the Moulton design having a unified rear triangle ---the second version of Trek's full suspension MTBs were this design----You still get a lot of pedal induced bob----this is very noticeable when you have significant travel. I would totally agree with you all that it probably does not matter and it probably does not slow you down. I would also believe it adds significantly to the comfort of the ride you get from 20" wheels.

Whoever posted the new Moulton bike Porn----you got me drooling. Sweet bike.