That's been the trend for a while - though studying for 2 years prior to getting dunked is on the long side. Usually 6 months to a year is considered normal. Pre-baptism they study one book (draw close to god, I think it is now?) Then post baptism they go to the next book (keep yourself in god's love?) And sometimes a third book, I think.
As they say in the baptism talk, it's not the end, it's the beginning. The beginning of a life enslaved to the cult and pressured to constantly be up on your indoctrination.