Dick, yes, I do fly 100 sqin models for sport use. I don't fly flat plate foamies, however.

The gentleman did not say what type of model this was to be... he only asked if the wingloading was unreasonably high.

I can say from extensive personal experience that the wingloading of 14oz/ft2 is completely and totally reasonable and the model should fly quite nicely, provided it has reasonable power. It will probably not be a great 3D aerobat, but it will be fine for pattern style aerobatics and general sport flying.

I currently fly a 75 sqin pylon racer with a wingloading of 23 oz/sqft, a 96 sqin pylon racer at 18 oz/sqft and several 100-130 sqin sport/scale models (warbirds) at ~14 oz/sqft. All of these models are quite safe and fly very well, provided you have realistic expectations and decent piloting skills.

-David