Congrats on the dat. I can't wait to see pics. The only dats I have seen lately in cali have been Indos, so my guess is that is likely what you have, but would need pics to be certain.
I have had my little 3" Indo for two months and he has grown about 1/2". If you want him to grow faster, stuff him with live feeders stuffed with high quality flake food. I did that for a while, but I don't have a quarantine tank for the feeders and I have received a couple of bad batches. Fortunately, they didn't mess up my dat, but I lost a few other fish that he was in with.
Me personally, I'm in no hurry for my little guy to grow and I'll stick to frozen foods for now.