I have been guilty of this, because when Gillingham signed Josh Pritchard Last Summer I thought the young midfielder was going to be the lynchpin in our midfield and someone Peter Taylor was going to build a team around, as Josh Pritchard had loan spells with Tromsø and FC Honka and he never made a first team appearance for Fulham when he signed for Gillingham, Josh Pritchard's best moment in A Gillingham Shirt has to be that cross he whipped in for Leon Legge's late equaliser at Deepdale, as Gillingham earned a 2-2 draw against Preston North End, we just never saw those moments often enough.
One player who did the opposite where fans didn't rate him to start with was Gavin Tomlin when he signed on loan from Dagenham & Redbridge, Gavin Tomlin scored six goals in nine appearances for Gillingham, including the winner against Hereford United, but before signing for The Gills, Gavin Tomlin hadn't scored in twenty one appearances for Dagenham & Redbridge.
So do we judge a player on who we signed them from, or do we wait to see how that player performs in A Gillingham Shirt before deciding if there good enough ???