These terms irritate the hell out of me!
When DD was a baby, I gave her a mixture of finger food and spoon-fed her. She ate the food (or not, depending on how hungry she was/whether she liked it). When she was a bit bigger I gave her a spoon too, eventually she learnt to eat with it. Is this "baby led weaning"?
Maybe I'm missing something, but surely everyone does the same? Why is it called this?
And as for "tummy time".... I really don't get it. 
Please enlighten me!