I will agree that the Internet changed wrestling in the sense that kayfabe is broken and insider terms are used on WWE.com and official WWE DVD releases, and I'm not sure that would have happened without the Internet. Yes, Vince admitted wrestling was fake in 1989 and it's not like he went out of his way to present the WWF as something real, but you will notice he stopped short of using the word "fake". Whether the majority of fans were going online to find out more about Montreal in late 1997 or not, the framework in which it was discussed on WWE television would have been very different had it happened ten years earlier. We saw fake shoots in 1988 with Paul E. and the Original Midnights showing up in the NWA, and again in 1990 with the Jerry Lawler-Snowman feud. But those looked very different than Vince Russo booking Hulk Hogan to literally lay down and do a job because of BACKSTAGE POLITICZ in 1999 and 2000, or from Kevin Nash being booked to "save" a match after Goldberg acted unprofessionally. There is a reason magazines like Pro Wrestling Illustrated didn't thrive in the late 90s/early 2000s wrestling boom and it was not just that technology was changing, although admittedly that was part of it.
I agree that what we are arguing here is ratios of fans. I think most people have always known it was fake. I think because wrestling is more open now, people understand (or think they understand) more about its inner workings now - meaning that I think the number of fans who know what a babyface and heel are, and what doing a job means, is higher now than it was thirty years ago, even if it's still not the majority of fans.
Still, WWE will never quite go all the way. Yes, they admitted wrestling was fake in 1989 (something which the vast majority of wrestling fans never knew he did, by the way - I'm convinced that was a bigger deal to hardcore fans than mainstream fans), but they also rejected merchandising proposals for Dolph Ziggler a couple of years ago that would include insider terms.