Phishing

I've noticed a huge surge in the number of phishing emails ending up in my spambox lately.

Each time I go to the relevant banks website and hunt around for the relevant report phishing link and forward the email.

Is it worth doing this? Do the banks take any notice or act upon these emails? Do they try and get the servers/domains that host the phishing sites shut down? Do they pass the details onto federal authorities?

Or is it a better use of my time to just ignore and delete these emails?