Guys, every party is looking for optimizing profits, which is normal. Anyway, as a standard they´ll have negotiated Stock-Protection, means that Dell should get the gap between the new prices, their buying prices * # of CPU´s they still have in stock.
Once this is done, it is on the Retailer when he will use the new pricing. As also Dell is interested in generating more profits, they´ll wait until other Retailers as well reduce their pricing. This should give them additional 2 weeks (average) until the new prices are spread and shown at retailers.
So bottom line: Watch out untul mid of August, latest end of August and you should be able to benefit from the new CPU pricings also at Dell.
Hope this helps.