I was waiting for this one. AMD slapped support in back when Llano launched under the A75. Intel rolled it out with the Pather Point (Intel 7 Series) chipset. That still does not mean that every motherboard vendor did not want to slap in a $10 controller, in addition to that SATA 6 Gbps, the PLX switching for try to avoid bottlenecking the DMI bandwidth available, and juggle dual GPUs back on P55 in 2010. DMI 2.0 resolved the bandwidth issue for USB 3.0 and SATA 6 Gbps on Cougar Point (Intel 6 Series).
USB 3.0 traction is amazing compared to Thunderbolt, even before you had it supported on a PCH/FCH. Some magic there. USB 3.0 dead, without Intel support? Alright...
Apple could have definitely added it if they wanted to. I just think it's strange to paint them as bad guys for not doing so. I never said USB 3.0 was dead.