Yes, based on the number of points people had on September 14, 2011 (the day before the new system went into effect), people were granted a bulk number of points on September 15th, to compensate them for the change in the redemption rate. These granted points are available for comps only -- not free play or cashback. I believe the number of points given were based on the number of points people had that were earned -- by gambling only -- after September 2008 (the date when "points for slot play" began). The percentage may have been something like .667, which would change 600 points into 1,000.
Letters were sent to people showing the exact numbers -- points as of 9/14 and points as of 9/15.
Snowgolfer, just bring your confirmation with you. I'm sure you won't have a problem with all 3 nights being comped.