Yes, even the company you mention.
Did you click on the google links and find the information regarding dosage?
If you talk about studies, post them for comment. General words like "many studies say..." sends the wrong signal, folks here respond quickly when a study is cited. If you want to copy the study citation from the company website, then go for it, the citation has been copied from the original study and is not covered by copyright. So you can copy the citation from the site.
Remember the resveratrol companies are not headed by scientists. I head the company I represent, and am not a scientist. I happen to employ a scientist to help on product development. Even the company you mention is headed by a journalist with strong opinions, he is not a scientist. I believe his partner that no longer is with him, was not a scientist either. As such, he makes mistakes just like I make mistakes... except I never have heard him say he was wrong in public.
I believe I have said I was wrong here on this forum when people smarter than myself have posted some interesting items. Being involved here has changed the way we do business, for the better.
I hope this helps, as some of the things mentioned can help folks respond in a quicker fashion to your genuine questions.
Again most companies purchase wholesale and sell retail, so regardless of the company you buy resveratrol from, the studies need to be cited so that some of us can dig out a semi-intelligent opinion. Of course... some of our opinions are less intelligent than others, but will make you crack a smile nonetheless...

Cheers
A