ORIGINAL: jamieduff1981
Higher wing loadings normally make a difference during the low speed phases of flight, for example a lightly loaded trainer is very forgiving to slow down and land, perhaps to the extent that it permits bad habits to be learned.
A scale warbird on the other hand is always deemed to be totally unsuitable for beginners. The reason for this is that the high wing loading means a higher stall speed. Warbirds don't like flying slow thus landings take much more judgement and skill than a trainer needs.
A high wing loading means that the aricraft must always fly faster than a lighlty loaded plane for the wing to support the weight of the airframe. It also means that the heavily loaded aircraft can more easily stall AT ANY SPEED. A tight turn, or hard pull-up in a highly loaded aircraft can produce a stall at very high speeds -- with impressive results -- usually a violent snap-roll & spin. Lots of warbirds are lost in high speed stalls.
High wing loading does have at least one benefit -- it makes the plane more resistant to wind gusts -- as long as it doesn't stall.