Doesn't sound unusual at all. However, there are a few things to consider.
1. Did you calibrate the speakers using a SPL meter?
2. What is the max on the volume dial? If it is +18, then -30 is (roughly) 48dB below maximum, which means its not very loud relative to the capabilities of the receiver.
3. Lots of factors affect the perceived sound level. Speaker sensitivity, size of the room, how far away from the speakers you are, is the room live or dead, etc ad nauseum.
4. Source material is recorded with wildly varying levels. Radio is extremely compressed and will be louder, dvd has a wide dynamic range and so might seem lower, older cds have low average power, new cds are highly compressed and have high average power levels. So there will be a loudness variation depending on what source you are playing.
5. Do you prefer loud listening levels and -30 to you seems not loud enough, while others may consider quite loud?
The key thing is to calibrate the receiver to reference level and then simply turn up the volume to the level you like. Also experiment with room treatments and speaker placement. If the receiver can drive the speakers to a level that is loud enough for you without clipping, then the number on the volume scale is not important (and don't compare your number to another receiver, even of the same brand, as they are not comparable).
