For the sake of amateur sport, I'm gonna rule this one legit. Nice work.
Although olympic tri splits are 40K, there are a few things to consider:
1) the courses are often less than 40K. I've seen this here in Southern California a few times.
2) human traffic on the course can either hinder or harm times.
Again, it's not too important to get caught up in the details of this challenge. In reality it's not that hard to just post a time on here and say you did it. Along those lines, it's most important to do a ride that YOU are confident in. And, going 40K all-out takes a bit of determination and mental fortitude. I don't know about you guys, but I've never done an olympic bike leg all-out (minus a relay I did). In that regard, attempting the 40K challenge and not breaking the hour is better than not trying at all.
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My Science Blog "The only fair race is the race against the clock" -Anquetil