I have booked a couple of stays in Boston for mid-August about a month ago. I have a habit of checking the prices every once in a while and tonight have discovered that there was a price drop of $40 per night. This was displayed when I searched for Boston hotels from the main hyatt.com page. I followed the link from the page that lists all Boston properties and the lowest price on the next page was the one I had previously booked ($40 more than originally showed). After I logged out of my GP account and repeated the search I was able to book lower rate.

I don't know if anyone experienced the same. I just wanted to give you guys a heads up next time you check for rate drops.