Last night, Rabbi Jeremy Wieder gave a lecture in Manhattan on the topic of:
How Old Do We Believe the World is ?
Non-Literal Interpretation of Scripture, the Story of Creation and the Controversy over the Works of Nosson Slifkin
Having never before met or heard Rabbi Wieder, I must say that I was impressed and enjoyed the lecture immensely.
The focus of the lecture was really more on the Non-Literal interpretation of scripture, rather than the age of the universe. He brought several sources from the Rishonim (most notably the Rambam, Ramban, Sa'adiah Goan and the Rashba) showing how it is permissible (in most cases - there are exceptions) to interpret Tanach in a non-literal sense and even in ways that negate the actual literal meaning of the scripture.
He summed it up very well at the end last night when he noted that according to the Rishonim above, if something one observes (through scientific observation, for example) is found to conflict with the Torah, then the Torah must "give way" to being reinterpreted (provided it does not conflict with one of our ikarai emunah). And, he noted, with regard to the controversy of Rabbi Slifkin, that the banners seem to hold the opposite position - that if one's senses and observations contradict something in the Torah, one must "throw out the evidence" (so to speak) and make the science fit the Torah.
As I said earlier, I enjoyed it immensely and was glad to have the chance to meet and talk with Rabbi Wieder afterwards.
Confidential to the gentleman who showed me that I was on the wrong subway platform -- thank you. :)