Yes, this bike sometimes does have a clunky gear change, especially from 1st to 2nd. But sometimes it's so smooth, I have to double check I've actually changed gear! The bike seems to have different moods! I find that it's clunkier at higher revs as well.
But I know have 6,900 miles on mine and overall, the majority of changes are quite smooth. Here and there, the gear changes make a good clunk, and 1st to 2nd makes a double clunk!