This is exactly my experience with E3s but without the tar strips. Riding in West Virginia in a moderate rain the front slid out twice for no good reason. I've been riding for near 50 years and have never experienced anything as disconcerting. I considered getting rid of the bike and getting something else if I couldn't ride it safely in the rain. Before doing that I tried a set of Cobras and the problem evaporated. They wear out faster but they restored my confidence in the bike so it's worth it. On the other hand you will hear from plenty of guys that never have a problem in the wet so I don't know why I did but the Cobras resolved it so it doesn't matter. Marc

In my opinion, a dangerous assumption.  Our contact patch is so small, you would have to go and examine every inch of the area where you slipped to find the root cause.  It takes a very small spot to encounter that would cause you to go down, and as others mentioned, it's susceptible to any tire.  So you switch brands and you don't hit a spot, so you assume that all is well using that tire.  Just this morning alone, I was at the courthouse, the parking had recently been resealed.  I never gave it much thought, moved slow as I normally would moving about.  When I went to leave, I got a little heavy on the throttle and I found myself drifting.  It took me back to the days when McDonald's would reseal the parking lot and little bleach and water would get some good smoke from the tires....