Mine were also about that size at the one year mark.
Some 7". Lots of 5-6". They were stocked March 2013 along with FHM (same time, pond half initial full) and were also fed pretty regularly (by hand). I think it was April 2014 when I caught several 7 inch, both regular BG and HBG. Was not supposed to have any hybrids but a few sneaked in. Maybe 5 out of a hundred (maybe less because they seem to be easier or more prone to being caught). One thing I have noticed about the hybrids is that they are "thicker", more like a GSF. So they tend to be "chunkier" and although I did not weigh for comparison I would assume the hybrids weigh more at the same length.
It appears the initial growth slows as what I can catch seem to be only nominally longer this summer. I've caught one RES 9" and a few BG at 8". That is the biggest. The bigger ones seem to be hard to catch this summer in the hotter weather. Or I just don't know how to catch them, which is likely since what little fishing I have done before this year was 50+ years ago then a couple years when my kids were young (catching little GSF). So I don't claim to be much of an angler. Makes me wonder why I even have fish!
I like feeding them better than fishing (fishing sucks when they are not biting but catching is kind of fun).
