Like so many have commented, I too didn't need an apostate site to start questioning things. I was stumbled by the 1995 generation change, and years later when the internet took off, it caused me to investigate what happened in 1975 (before I was a JW). The stories I read were a revelation to me and they had an authentic sound to them. They didn't sound like sour-grapes - just facts, many facts that proved beyond a doubt that the rank-and-file was lead to believe that the end was going to come in the fall of 1975.
Remember folks, the rank and file didn't come up with this, it was the "WTS leaders" that originated this teaching. I'm sure there are many JWs who are reading this right now and saying to themselves, 'Boy, something is wrong... I should investigate this further.' The nail on the coffin for me was that there are so MANY issues/problems/etc. with this religion that I never realized until I started researching the WTS "outside" the walls of the WTS literature. That was very revealing to me as well because the WTS paints this white-washed picture of themselves and their history. And, for any outright mistakes (like 1975), they simply "spin it" (like politicians), "Oh, at least we were awake spiritually speaking".
Just to repeat what caused me to turn away from JWs, I was stumbled by the Governing Body when they changed "the 1914 generation teaching" in 1995 - something the Liveforever book called "a certainty"! (Apparently, nothing is a certainty in this religion, not even the defintion of the Faithful and Discreet Slave.) Honestly, I'm not sure I understand how some of the old-timers aren't crippled with disappointment - I believe some can't face the truth of what all these changes indicate - The WTS is not who they say they are. That realization can be devastating to someone who has embraced this religion as "the Truth" for all - or most of - their lives!