It is not super consistent, some days it is faster and other times it is slower. The target is roughly a block every 30 seconds though and is pretty accurate over long period of time.

I created a Countdown Timer here...
http://www.arewethere.yt/MINTCOIN/30183.htm

I have been updating it every few days, and it seems like the blocks are going a little slower than 30 seconds. 6 days ago I updated it within a 5 minute window estimated upon 30 seconds, and today when i check the calculation it is about 3 hours behind schedule, so not much.  I just updated it again, now, to within an hour or so of accuracy based on 30 second blocks.. (added about 2 hours and 45 minutes to the countdown).

The time before, the blocks were going faster than 30 seconds, so I had sped up the timer.

All in all, I agree that it looks pretty consistent and reliable that it will be November 30th or December 1st when the increase in the money supply will be slowed down to about 7%... basically we are minting coins at about 70% of the minting rate ...so roughly 70% of 10% is roughly 7%  we can expect as far as the increase in the money supply over the coming year.