Hi there possibilities. Welcome to the site.
One said the letter stated that there is concern about lack of attention to JW families... about brothers and sisters leaving the truth...about families coming unprepared to meetings. The poster of that message said they were purposely remaining anonymous, and I can see why. Those statements were not in the letter at all.
The poster would have been using their knowledge of the Watchtower Society's motives based on the history of the organisation and their previous experiences. When significant changes are made to the way that the high control group is run, we who have been affected by it (especially those of us with family who are still trapped in the group believing what they are indoctrinated with) like to try and work out why.
Edit: Reading undercover's reply above, I realise I misunderstood your query, possibilities.
It's good you're doing your research properly while you are studying. It's very likely that the person/people whom you are studying with are very sincere in their attempts to bring you into their religion; unfortunately this doesn't stop the group ultimately being very harmful. Keep researching, using a variety of sources.
Just one site for you: Facts About Jehovah's Witnesses
All the best and, of course, feel free to post any questions.