Disclaimer: this post contains personal informations and (very mild) generalizations about gender behaviour. If you think you cannot handle it properly, please avoid it.
Unfortunately, the most surprising information I had recently has been my February break-up: this girl I was dating and was madly in love with exhibited all behaviours of being in love with me too... There were some problems that prevented us getting together, but I thought they weren't so determining. It turned out I was deadly wrong: she started dating a guy that was nearer to her home and had more free time, and after two weeks I was dumped. A month later they were engaged. I have thus increased the probability of correlation between behaviours signalling love (signs of affection, sex, gifts, etc.) and predatory behavious (securing a mate for resources). Which is another way to say that now I'm less trustful towards women :/
I don't think your update follows from the information you provided. I think someonewrongonthenet asks a legit question.
I think observing how fast the "signs of love" develop is a useful heuristic in determining how fast they could dump you. If a person falls in love with you even before you have demonstrated your worth, something is wrong, assuming you're looking for a longer relationship. I personally think this works the other way too, I don't think falling in love is a useful heuristic for finding a suitable partner. Some people are just addi...
Information that surprises you is interesting as it exposes where you have been miscalibrated, and allows you to correct for that.
I suspect the users of LessWrong have fairly similar beliefs, so it is probable that information that has surprised you would surprise others here, so it would be useful for them if you shared them.
Example: In a discussion with a friend recently I realised I had massively miscalibrated on the percentage of the UK population who shared my beliefs on certain subjects, in general the population was far more conservative than I had expected.
In retrospect I was assuming my own personal experience was more representative than it was, even when attempting to correct for that.