Mods, should we shear off the posts about "same rankings, but less traffic" to a new thread? Seems like it's picking up steam and may or may not be part of April algo changes. (I've definitely thought I was seeing it for a few months).
Str82u, it wasn't weak at all! I'll go a step further than ColourOfSpring and say it almost surely will explain *some* of the queries we're talking about, and must be ruled out in each case for us to discover the real cause.
The more I read on this phenomenon, the more I think maybe it's a fundamental change in how people are finding websites, and NOT just something Google is doing. Or maybe it's a combination of the two, but I sure can't catch Google "disappearing" my sites from the SERPs even for a minute, and I can't think what *else* they could do to cause the effect I'm seeing. This could get very interesting.