Nearly all my UK sites have seen a 50% reduction in traffic this weekend, none of them are Wordpress.
FWIW we had our annual blues rock weekend:
Friday: Quieter than expected
Saturday Afternoon: Only steady
Saturday Night: Heaved
Sunday Afternoon: Totally & utterly dead
In fact the entire county was dead on the Sunday according to most here in the trade.
We never got out of the first one I'll tell you.
</slightly off-topic however very coincidental>