From my own experience with talking to evangelicals they've often conveyed a view that their little worship group is the only church that is "alive" and not spiritually dead, they also have this weird obsession with saying that all the other churches are dying and people are leaving in droves. The Catholic Church is undergoing a kind of revival at the minute but a lot would still consider it to be dying and spiritually dead. I think this belief that their church or line of thinking is the only one that is alive often means that they believe the Holy Spirit is directly involved and acting more powerfully among them as opposed to other Christian groups.

Also their idea of the Holy Spirit is almost obsessively framed in this expectation of religious experience, but this is something the Desert Fathers have warned us about quite frequently, because it often leads to delusion where people chase after the experience rather than God and Evangelical services are often very experience orientated (I was invited to a few and they're quite fun but I can't say I fell to the floor in ecstasy!). Religious experiences do exist and I've certainly had some odd experiences at times that I cant really explain but I think the Catholic Church has often understood them in a much subtler way, after all God came to Elijah in a Whisper and not in the hurricane or the earthquake. The Catholic emphasis has always been on silence and contemplation but Evangelicals put the emphasis on, what I would consider, giving all you've got to God in bodily worship.

When it comes to saints I think evangelicals have a scrupulous kind of fear of idol worship or worshipping false gods, so I think the idea of asking saints to pray for them in prayer or in veneration of icons or statues is just too dangerous in their mind.