Gormless just means not too bright - it doesn't preclude somebody being pleasant and friendly. I love the way every word I write is studied so carefully!
Greatnan I don't disagree with you re SF although I think she may well be a warm and caring human being, easily influenced and seduced by wealth. Using the word 'bestest' seems to me to be her trying to be one of the girls, in this case, her daughters' world.
I think it might be well known outside of business, Sel! SF wasn't too bright letting herself being seen with her financial advisor in a suggestive situation, or running up millions of pounds of debts. I don't think she is likely to win Brain of Britain. However, she is certainly bright enough to know what it takes to stay good friends with Andrew - I think keeping quiet about certain matters could be the secret of her success.
Gosh, I'll bet Sarah Ferguson is really hurting at your comments. Still, as she didn't go to a convent, and probably doesn't give a fig about such things, she'll be able to cope.
I think the gormless Sarah Ferguson coined this non-word. She said her daughters were her 'bestest friends' (poor girls!). That's what you get after many years of expensive private education. At least my convent taught me about comparative and superlative adjectives.