Hi Dinky
I'm so sorry for not replying quicker, but have an almost 3 week old baby in my arms constantly (or on the breast) and I'm not yet as skilled in feeding while moving around or even typing!
First off, articles in magazines are the reason I've stopped buying baby related magazines, because it's always a 2 or 3 page spread on the 'conventional' thing to do and then a 2 sentence mention of any other thing you can try. Baba & Kleuter once said after their 2 sentence mention of BLW "we do not endorse this type of feeding" - sure, we can all guess why. So I really hope the article you saw was more informative!
My gut tells me 4 months might still be too young, but then again, I know one of the ladies on this thread had a 4 month old eating an apple or a pear, he was just that advanced and ready and age is only a number. The only way to know if she is ready is to give her the opportunity to see with food.
Again, as I've said before, if you can get your hands on the book, please do. It's been almost 3 years since mine started blw so I'm a bit rusted. I started B off with "bad mommy moment" cookies, marie biscuits I think it was, just to see if she can hold it and take it to her mouth and 'chew' pieces off, well in reality she drooled all over it and it got soft and she gummed pieces off (only got her first tooth at 9 months or something like that) Her first real meal with us was butternut, potatoes and chicken at 5.5months and think soft but not turn into instant mush, that can be cut into strips a little bigger than their fist so when they are the sucker in their hand there is a piece sticking out the top and or bottom.
It's messy, so get a dog! No seriously, get something to put under her chair, and always let her wear clothes you don't worry about, I know B loved plums and those stain! Nice ripe plums are the bomb. Let me know if you have any more questions and I'll hopefully get back to you quicker! And pretty soon I'll be doing it all again! Yay, can't wait.