Yes my memory needs calibrating as you eloquently pointed out. See there? I need to revisit that review. I lack the technical aspect of all this new equipment. Never blame the equipment is a good MO and not my intention at all. It's the learning curve I emphasized that is at stake. But as I reviewed the review I see that I may be expecting more than necessary. The vulture shot is no more detailed than some of my results. The dove is another story. I just need a spray bottle.
Also the lighting is key. This too stands out...
"In all likelihood, the 150-450mm's optical performance won't be the limiting factor when it comes to the sharpness if of your photos. Instead, the stability of your tripod and/or your shooting technique will be put to the test. Since you might often need to use higher ISOs to be able to use sufficiently fast shutter speed, we strongly recommend sticking to RAW mode at all times. We were not satisfied with the level of detail in out-of-camera JPEGs from the K-3 when using this lens at ISO 400 and 800, as the noise reduction kicked in and blurred fine details."
There is a focus learning curve too. It's a tricky lens and I will highly anticipate any others that own this lens to produce exceptional birding photos as in the dove at 450mm. I love the lens and will give it my all to master it and then judge it. My skills must improve over some time to be qualified to say too. Maybe it is a tele shooting senerio in general. Before this I've only owned a 200. Different world indeed.