Over the years I have caught many lakers over 20#'s in Lake O.
Back in the 90's when the Ganny had epic fall laker runs due to the stocking there it was not uncommon to get several over 20 in a few hours in the evening. Also have caught lots in Western Lake O but the biggest (in the mid 30's) came off Pt. Credit in August after a North blow.
Having said that, compared to our Arctic Lakers they fight like wet socks!!!