If they have done serious research, I think they deserve consideration even if someone's ox gets gored.
I would rather face the truth about things, even if it makes people not like me or what I say. There are things I definitely believe, things I'm not sure about, and things I seriously doubt that have come down to us through tradition.
Aliska makes a good point. While I have not "extensive research" on this, I tend to believe the majority of it to be true.
But just like the Medjugorge chasers, if this were somehow proven NOT to be true or of divine origin, it shouldn't shake our Faith. One is private revelation, not binding on Catholics, but piously believed. The other is public revelation. Our Lady of Guadalupe, I believe, seems to fit well with the Kingship of Christ and Our Lady of Fatima, in my opinion.
We shouldn't be surprised that other Catholics, all orthodox, don't hold this worldview. But they should read Pius XI encyclicals on Christ's Kingship and on the Feast of the Kingship of Christ, as well as Leo XIII and others.
My point being, anyone can make any claims that they want to. How can we determine "If they have done serious research", when you have provided no names, (and therefore their qualifications and potential personal agendas cannot be determined), and no source to be evaluated, no evidence to back up the claims.