No this one. Foxconn and Hon Hai, which is under Foxconn produces Apple products from Macbook Pros to iPhones. Foxconn also manufactures for Sony Ericsson along with Compal, Longcheer, the list goes on. My point Foxconn almost exclusively from what I was told and read produces for Apple. Apple doesn't have to visit/oversee a dozen or more different locations for their products. They really only need to oversee Foxconn, so quality issues should be minimal compared to other companies but it's not.
I think you forgot to add the link.
By exclusively produces for Apple did you mean:
a) Most of Apple's products are made by Foxconn (What I think you meant)
b) Foxconn makes mostly Apple products.
Also, your last statement is rather exaggerated. I'm not going to deny there's an issue (or several) with the iPhone 4. However, considering how much press there is about it, proves how uncharacteristic it is for Apple. Were issues, like those with the iPhone 4, common for Apple there wouldn't be much if any press on them.
So you see, because there is so much press on the iPhone 4 issues proves it is very uncommon for Apple to produce a product with such flaws.
I've been assuming this from the start that there is a yellowing or discoloration issue. I see no other reason for it to be delayed. Everything is the same except for the color. It has nothing to do with reception problem or the sensor issue because according Apple there is no issue or it's a non issue.
The White iPhone 4 won't yellow. There is a layer of glass over the paint on both sides on the iPhone. Your hand will never actually come in contact with the paint. Residue left over on the screen can easily be wiped off thanks to the oleophobic coating.