Nope. No corn at all, it almost moved me to tears NOW. Then again, my father died a month before it aired, but I don't remember watching this episode at the time. There could be good reason for that, I dunno. Given my reaction to it, my thought is I probably DID watch it then, which is why it moved me now. Maybe.
This is also the first I've seen Ronald D. Moore's name, and Google confirms... this was the episode he wrote on spec and got him onto the show.
http://en.memory-alpha.org/wiki/The_Bonding
You can tell.
Greg