I am sure bosch would not want to lose DC as a customer, so it would make sense that they don't want to talk about system problems. However, they should realize that they too will get a bad reputation. The VP44, IMO has already done that because of its short life compared to some of the mechanical pumps.
Through my experience, I have been convinced that the more you filter any fluid the longer the system will last. In injection molding I proved this over and over in hydraulic systems, heat transfer fluid systems, and water systems. Unfortunately, I don't have the money, at this time, to install a aftermarket filter system on truck. It is unfortunate that consumers should even have to worry about such after we pay $30k to $50k for a vehicle. I know that the mfr would say that they don't want to install expensive items on new trucks becasue in their mind (and I am sure they have marketing studies to show) it would make them less competitive in their final price. So now we, as consumers are buying trucks like we vote for our president - we don't really want any of them, so we vote for the one that will give us the least problems. Trucks barely make the warranty before they need to be replaced and the presidents seem to barely make four years. Seems to be the American way. Of course, when GM is paying over $1000 per vehicle in retirement benifits to its former employees and the number of retired employees is growing, the profit needed to operate and satisfy the stock holders is increasing. I don't have all the answers,(or at least time I don't have time to post them (joke)) but it seems to me that some of the business practices don't make sense - like making a truck that's fuel filter system does not protect its components. I firmly believe that all 06's will see a fuel problem before 150k unless the owner takes precautions to catch the contamination that come in fuels. I think that many of the 06 owners may not realize they even have the problem at first because it usually starts with a slight vibration during idle. It would not surprise me to see a class action suit come from this as DC denies more warranty claims as these trucks get more and more miles on them.
Dang, I need to throw my soap box away.