I honestly think people just don't know what else to say? Because its amazing how everyone seems to be an expert on what size your belly should be...
After having numerous comments within the past few weeks, and having people ask me if bubs will be here by Christmas (when I am due midway in Feb!), I expressed my concern to my midwife... She then measured me, and bubs, and my fundal height appear to be perfectly on track... which was good to hear.