That's Joel Montvelisky, introducing the State of Testing Survey 2015.
I'm certainly in favour of data and I'd agree that a trend can be better than a snapshot. But if you want to know the state of some system right now for the investigation you're performing right now and you've no reason to think that right now is related to back then, then perhaps right now you'll take the snapshot, right?
Openness and openness to challenge was one of the things I liked most about the previous, inaugural, survey. In the discussion between Jerry Weinberg and Fiona Charles about the results (transcript here) Weinberg's opening remarks include:
We need to be careful on how we interpret this data [...] One way to look at the survey is that it’s giving information about what information we should be getting.I'm looking forward to seeing what was learned.