Nah. I've had terrible and inconsistent results with this. I literally hate this thing so much that I've stopped using it altogether. It's most likely due to me not figuring out exactly what's going on but I can't be helped at this point.
No way!
I just tried it, it doesn't work :( That's too bad.
Are you on a mac and using the system default vim? If so, Apple cripples it to not be able to directly access the system clipboard -- use homebrew's vim or macvim instead.
No, I'm on Ubuntu, it just looks like this method doesn't work with terminal vim. Your sibling comment looks like it has a solution, though!
I am not sure which version of vim you are on. I have been using clibpoard paste for a long time in Ubunut. Do a ":version" in vim and check if it's compiled with +clipboard. If it is, then it should work.
Also, you can have this in your vimrc:
set clipboard=unnamedplus
And then your vim copy-paste will be in sync with system clipboard(no need for +p or +y).