I've actually noticed a drop off for the past year or so...
I'm no "extreme" couponer, but I used to regularly save 30% on my bill using store sales and coupons. Now... the coupons aren't there so I have to get even more creative with store sales and do my menu planning according to the sales fliers. (I used to shop to stock my pantry and then menu plan from the pantry supplies. Now, it doesn't save much doing it that way.)