Article link: http://blog.askmrrobot.com/feral-amr-simc-pooling/
Swol did a full investigation into pooling for feral druids and found that in a handful of cases, not pooling does slightly more DPS, in other cases, slightly less. By 'slightly' we mean within 1-2%.
This was done using SimC, and then at the end some comparisons were done using AMR. Swol did this to make sure the research was solid and not skewed by using a favorite simulator.
Takeaways: Swol points out that there is another viable way to play - one where you don't focus on pooling. When other people recommend pooling, they aren't wrong - it's just as good. So pick your preferred style.