The first few minor updates usually come fast. This is Apple fixing issues with the first release. No matter how good your are, there are always bugs that don't get found until millions of people are using your OS on every conceivable device and configuration available.
Most of the bugs should have been found by now, so I expect the rate of releases to slow down. From now on it's probably going to be about minor feature changes or additions, security updates, and swatting whatever bugs remain. There are always more bugs to swat.
The good news is that minor (point) updates rarely cause problems. They also take less time. As long as you are not a jailbreaker, minor releases are good news. They make your device more stable, and sometimes include slight increases in speed or battery life; as Apple tweaks things for real world use.