Size Is not related to technological advancement is not only just proved by the fact that migratory birds can see magnetic field and use it as a compass to guide them through out the globe. Miniaturization and excellence can go hand in hand.
It only proves just like nature may have designed microcosmic life which may be very small in size but may be having Intelligence very high compared to that of a human being. I am sure future research may reveal such fantastic revelations. Maybe we are Co-inhabiting Earth with many other microcosmic intelligent species we are not aware of and they may have a role in our destiny.