Are plane ticket prices dropping?

[KCJazznBBQ]

For my dates in July, holding steady at $550 out of KC with one stop in ATL on Delta. Arrival and departure on Wed.
KAYAK is telling me to "Buy" as prices may increase in the next 7 days.

[kchristopher]

I read in consumer reports that you can save on airfare by shopping online between Monday and Wednesday (with Tuesday being the best day to buy). I have been watching fares for my family's September 28 - October 5 trip from Atlanta. I have noticed that this is true. Fares tend to be lower during those days (especially with Delta). Today Delta is $404 RT.