Quote: I am not excited about this boy. As you mentioned, he does have a squirrel tail (90 degrees from horizontal) which is a serious defect . The photo is not completely from the side which may be shortening his back optically so it may be fine. His breast from this angle does appear rounded and carried forward and high.
Other flaws are dropped wings (should be carried tucked up more), ear lobes should be a smooth white and they are stippled white to mostly red with a crease (or at least this one is), his wattles are supposed to be long and thin and these are cupped. His comb has uneven points with a fold at the front ( but this is common for a roo with a crest, so I don't have a problem with it since the comb is not flopped or twisted), his eyes may be a bit light ( they look more orange than reddish bay but it may be the way the light is hitting them). As for color, I personally think is light but within the standard for the most part and it may be the exposure causing what should be dark grey to look light grey. The standard calls for some white feathers on the tail permissible, to me there are more than a few, but that's a judgment call.