YES, things do improve as baby gets older. My son is now 7 months old, he has had reflux since 1 week old, he has been on Losec since 7 weeks old, it is magic. My husband and I went through so many, many sleepless nights to start with, but since he's been on Losec, there has been a 100% improvement!!!! As soon as he took it he was no longer in pain and more importantly, he was sleeping for more than a couple of hours at a time. He was awake and crying approx 16 hours out of every 24 before his medication.
I found that wrapping him up really snug and giving him a dummy helped a great deal. I know a lot of people are against giving their babies medication (so am I) but the paediatrician said that reflux is very painful for the baby that's why they cry all the time, as soon as I heard that, I didn't hesitate in giving my baby his medication, I just didn't want him in pain.
Lastly, babies do get better as they get older. As I said my baby is now 7 months old and I am weaning him off his Losec, he has not had it at all today and he seems fine (thank God), he very rarely sleeps on his back, he mostly sleeps on his side, it's obviously more comfortable for him.
Good luck with every thing. I hope it all goes well for you.
Mum to toddler