Landing pages that convert
chancebarnett.com
chancebarnett.com
I love little ideas like that where I can have the A/B test literally live within a minute.
With regards to testimonials: I have rotated through a couple. They're all authentic so I can't create perfect tests of every element, but my experience has been that a generic testimonial attributed to someone just like the target customer outperforms a better testimonial attributed to someone who isn't. (In my case, a name suggesting an older woman clocks a generic male name. Which in unsurprising with 95% of my customers being ladies and most of them being older.)
(To satisfy your curiosity, it was Glenda 25.12% vs Dave 23.38%, significant at 90% confidence, and I don't have numbers handy for the testimonial vs. no testimonial test. That was prior to me tracking the results in a systematic fashion. It doesn't look like it is written anywhere on my blog, either.)
I've heard many arguments for .05 being the highest acceptable for research but it seems like you have found an acceptable p-value that is out of that range by quite a bit.
2/3 is a chicken or the egg thing, where you can't really get to being able to leverage real social proof and credibility until you get success, so you have to leverage "white lies" or other tidbits to get to that point. 4 and 5 are obvious, although they are extrapolated better than you normally see.
They're probably interested in your product - they Googled it after all, thats why they ended up there - but they have a dozen similar pages to quickly review. So no, interest doesn't mean they want to give you their email.
Actually, I'm trying to get more information here. Its not clear how this would work, or what sort of person would care about some whitepaper.
I guess part of the problem is that the post is very vague about what the product is, who the target customer is, or why they would care about a whitepaper. If you make a consumer product/SaaS, what could they be offered that they care about to make this work?