R. Dovid Orlofsky published an official letter on the Slifkin issue and I find myself agreeing with this one:
Several months ago, a letter was signed by many gedolei Torah establishing a halachic position regarding Torah and Science. The attitude that Chazal can be wrong when it comes to science was deemed to be illegitimate...
Let me make [myself] clear; I am not saying you have to accept my view on this subject. There are gedolei Torah who disagree and feel that it is acceptable to espouse such a view. But though I try to present all the Torah views on a subject, I personally try to express the views of my Torah authorities...
You can agree with these gedolim or not, but it is inappropriate to attack them or question their competence.