My opinion. About 80%.
And from that, most of them found some real truth about the WTS. So many of them harbor ideas about the substance of the current teachings in the form of the buzz word "current understanding". Sure, they'll go along, for now, with the general flow of the WTS because they believe many of the central core doctrines that are taught. Some being the non-Trinitarian view, no hellfire, no immortal soul, paradise on earth and/or heaven..etc.
Evidence shows that those who "HAVE" to teach topics that they now are unsure of and have no confidence in (such as 1914, seven trumpet blasts), they have no enthusiasm in their talks or presentations. Of course not. They don't believe it whole-souled.
The only ones who will preach with such fervor about certain doctrines of the WTS that are exposed on XJW sites, are the ones who haven't seen these sites or are still hard-core believers in such topics.
I'm confident to say that many JWs who viewed XJW/apostate web-sites are thinking twice about the company in the form of the WTS and the dealings of such. Such can be seen of the decline in donations.
Of course, there may be a handful of JWs who will reject all XJW/Apostate sites if they stumble upon them. But only a handful.
Just my opinion.
Alligator Wisdom (aka Brother NOT Exerting Vigorously)