Spruce is a harder and more resinous (hm, is that even a word in english...?) wood than cedar. It has more resins in it, that is, and therefor has to be broken in over a period of time to be able to vibrate more freely.
The good news is that the more you play, the more the top/soundboard will vibrate, and the better the guitar will sound as it matures, or "opens up". It´s hard to describe exactly what happens with the sound in this process, but generally speaking the guitar will sound warmer and fuller. It adds a little magic, so to speak. Listen to a old vintage Martin, and you get a pretty good idea...
I guess you could say that your Avalon is a bit like a high quality, vintage wine, getting even better with age.
