Bees reaction after swapping frames

After I swapped some frames of house bees from a strong hive over to a couple of weaker ones, as Iddee suggested, the weaker ones already seem to be more vigorous. I noticed some orientation flights today, and they are taking sugar water like it is going out of style. Thank you for the advice. My question is, the bees, especially on the stronger hive, are really out on the "front porch" en masse, and are really buzzing around. I wouldnt say agitated, but very active. Is this normal? Perhaps Im just worrying to much.

Mark