Is this progress in meditation? Sometimes during meditation (Vipassana), I've noticed how the mind tends to get back to breathing by itself, without effort. Can I consider this a progress in meditation? I know that it would be a hindrance to like this when it happens or to dislike when it doesn't happen. 

The question is: does this say something about the mind? (I've been practicing daily for the last 9 months).
Returning to the object of noting sounds like Khanika Samadhi


  Pure Vipassana yogis can appreciate and understand the power of Khanika concentration. For when their noting gains momentum, they can see for themselves how the noting goes on by itself uninterruptedly without a break. The noting seems to run on its own steam without any need for the yogi to make any concerted or deliberate effort. Thus, it is not unusual for a yogi to be able to sit for an hour, and even several hours, absorbed in noting. During good noting, especially at the insight knowledge of equanimity (sankhara-upekkhañana), the mind just stays put on its objects and refuses to wander. Even if one wants to send the mind out, it refuses to go and it recoils back to whatever Vipassana object it is noting. There have been cases of yogis being able to sit for six or seven hours in a stretch, or even longer. From this, one can deduce that there must be strength in Khanika concentration; otherwise how would yogis be able to sit in rapt concentration for such lengths of time.


http://www.angelfire.com/indie/anna_jones1/vip-jhana.html