First, that the "natural language" requirement was gamed. It deliberately simulated someone for whom English is not their first language, in order to cover its inability to actually hold a good English conversation. Fail.
Agreed. It is easier to trick someone when he wants to believe, and the organizer of this event comes across as a gullible media whore in his eagerness to claim that the Turing test had been passed.
Second, that we have learned over time that the Turing test doesn't really mean much of anything. We are capable of creating a machine that holds its own in limited conversation, but in the process we have learned that it has little to do with "AI".
For its time, it was a pretty good stab at the issue, and one that implicitly recognized that intelligence is a generalized skill. It is a better measure than using chess-playing or mathematical theorem-generating. The fundamental problem with these alternative measures, and others like them, is that they are based on the fallacy that just because humans use their intelligence to perform them, they necessarily require intelligence.
As there was nothing remotely resembling AI when Turing formulated the test, it is not surprising that he overlooked the degree to which ordinary conversation can be manipulated, and also the amount of effort people would put into doing so. I imagine he thought of his test as a scientific experiment, not a competition.