I'm right there with Phelonius
and a
+ 1 Bill
When I ride two up and the weight is there a little longer in each gear is what I'm feeling too.
And a good tip to remember even if it's obvious, is
shift and apply throttle until you are not accelerating anymore that means shift gears

and a little idiosyncratic note:
When I'm in 2nd and ready to shift into 3rd at about 28mph Suzi sure whines and rattles and just seems overly loud, but that's just how these bikes are.