Correct, the point is we can see there is a small increase in hashing power before retarget therefore over the last week blocks have technically been confirming ever so slightly faster than expected and more miners are coming online not less like NEM minnow  suggested.

Most people don't understand that because of the Poisson process we should expect blocks to sometimes takes hours to confirm (albeit rarely) even if more miners are coming online and the average confirmation time is generally quicker than normal.