All over Usenet - and I only subscribe to 41 groups out of tens of thousands of them.
The problem is while you have limited experience that shows one situation, I've got what appears to be broader experience with many different lines of each of the discussed vendors products, for many years, over many different types of WAN connections. My experience, is that "some" D-link product lines and some Linksys product lines are crap or only residential grade devices, while Linksys doesn't offer higher quality devices, D-Link does, and it appears you have NO EXPERIENCE with the DFL devices.
How do you explain 20+ people that I personally know that still have working 604 routers, that have never failed, for all these years - and I know the same number in Linksys, but I've never seen either of their residential routers provide better quality than the other.