It's funny, I often thought about this. When I was studying in the mid-1980s, it took me ages to cover the required books. Then they introduced the Knowledge book and when I had a couple of studies, I was told by an elder that if the person isn't making 'significant progress' once we have covered half of this book, I should drop them like a hot potato to make them realise the urgency. The thing was, as I explained to this 'caring' elder, some people have many problems and issues going on in their lives and they weren't mentally or emotionally able to make 'significant progress' in so short a space of time. I was told that I needed to heed the advice of the GB - they received their info DIRECTLY from Jehovah and knew what they were doing. I didn't take any notice. One lady studied with me for 4 years. She still isn't baptised and is not regular at meetings. I am so glad because I really like her and now I know she is safer on the outside.