Wing Keel- pros and cons
As far as grounding goes I have heard it is a problem with winged keels. Personally I didn''t find that to be the case - it seemed to "bounce" off the bottom first. My fin keel seems to dig in more. Of course the fin keel boat displaces twice as much as my winged keel boat so I''m not sure it''s a fair comparison. I honestly never have run hard a ground with either boat i.e. full speed since I knew I was in a shoal area and proceeded slowly. One thing I have heard is that you have a serious problem with a winged keel if you run aground at high tide and then it drops - apparently the winged keel will not allow the boat to settle on her side.
I really loved my winged keel boat - an O''Day 322 - sailed really nicely. I''m not a racer so maybe someone who is can give you of an insight on the keel differences and performance.