Referring not to Al Gore, but to Gore-Tex.

Can someone simply explain the differences between Gore-Tex, Gore-Tex XCR, Gore-Tex PacLite, Gore-Tex Performance, and Gore-Tex Pro?

Also, how do these products compare to eVent?

I think Gore-Tex has been improved and its base product is now "Gore-Tex Performance".

I think Gore-Tex PacLite is Gore-Tex's lightest offering. Not sure how it compares to others in breathability and water repellancy. . .

I think Gore-Tex XCR was Gore-Tex's highest tech offering, and it has now been upgraded with Gore-Tex Pro. Not sure if it is just a name change or if the technology is better.

I suspect there is little real world difference encountered among all these if you took the same jacket using all these different materials, but I am just curious. . .

And how does Gore's Windbloc fit into all this? Would it be another layer added to one of the aforementioned membranes? Has it been supplanted?

Color me confused. . .