Rav Nisson Kaplan from the Mir gave a shiur saying that the proof points to the Murex Trunculus being the ?????, however the Gedolim didn’t accept it. http://www.tekhelet.com/mml-RavKaplan-I.html.
However it’s important to point out that most gedolim who actually looked through the facts wear ???? and are very positive about other people wearing ???? as well (i.e. Rav Belsky, Rav Elya Ber, Rav Moshe Mordechai Karp Rav Zalman Nechemia Goldberg etc).
Rav Shlomo Zalman wrote a letter about ???? a copy is posted on:
http://www.tekhelet.info/111037/????-????-????????
15 years ago Rav Feivel Cohen sent a letter to Rav Elyashiv asking being that:
1:
there is nothing to lose by wearing fake ????
2:
“????? ?????? ??????? ???? ??? ????? ?? ?????? ????? ????”
would it then be ???? to wear the dye?
Rav Elyashiv responded that being that this is the 3rd proposal ???? we don’t have to belive the ??????.
http://www.hebrewbooks.org/pdfpager.aspx?req=50106&pgnum=4
It’s important to point out Rav Elyashiv was addressing Rav Feivel Cohen’s question about ?????? ???????, not the specific proofs for the murex trunculus (Rav Feivel Cohen said that at the time he didn’t even know the arguments and it certainly not part of his question).