The other comment threads on the internet aren't doing it for me. This episode is an important one in the shipper lexicon and I want to hear what this community has to say about it.
Personally, it was a bit bitter than I dared hope. They addressed the issue head-on in a way I thought would be impossible given the show's frenetic pace. And I can accept the reasoning, and think it even gives a little insight into Jack.
Two little tidbits. I thought the Jenna reveal was kinda cool, especially that he would keep it from her until now. The second was Jack's initial reaction to the question, suggesting Liz was trying to conjure up his mother. I think it clinches the theory that Colleen's been shipping them all along. So there's that to cling to.