While I knew that Vista support for going to be a big issue for Strawberry, I was never really sure quite how big.
Preliminary numbers from the fairly crude Google Code download counters suggests an increase of around 10%. That's probably not a direct measure of Perl Vista users, but rather approximates a measure of how many people I was previously scaring off with the "Not everything works on Vista" warnings.
Average downloads for 184.108.40.206 over 13 weeks: 1800/week
Average downloads for 220.127.116.11 after 5 weeks: 2000/week
Of course, statistical errors probably account for more than 10% error margin.
But hey, we just ticked over 2k/week downloads, so time to celebrate a bit