The odds are not good, to be true. However, if you ever knew Evi and heard stories from her life, this story will end "and then after X days, they were found having survived using make shift fishing gear and drinking rain water.
The odds are long. However, in the past few years there have been instances of people beating the odds. They survived for 60 or 90 or even 120 days on their life raft after their boat sank. Not many, mind you, but it is possible.
Finally, no wreckage has been found. Usually for these events some wreckage is found. This increases the odds. Not by much.
Looking at the TomNod stuff can't hurt. The worst that would happen is that people waste time looking at snippets of the Tasman Sea rather than watching TV, porn, movies, etc.