We had our DS tongue snipped at 4 months. I've since been to the dentist and he agrees it has reattached some what but suggested holding off until he was finished getting all his teeth then they would laser both his lip and tongue.
B/feeding was always painful for me even with shields we mixed feed since 10 days old. Whilst we did see some improvement in his weight gain initially it wasn't until he was well on his way with solids that we saw any huge improvement - always on or just below the bottom line.
This Christmas at 18months old he managed to stick his tongue out just past his lips - doesn't look the same as when you or I would stick our tongue out but was just a bit exciting for us to see!