Not much at all. I receive an email that i got funds shorty after the payer confirms he transferred it. However in the email it says funds may take some time to show up in my account, but they appear in few minutes later.
I am using GenertePress theme. hosting with Priority Prospect.
You got some things to fix in your site to make it faster. If you scroll down the result page on Pingdom, you will see what is taking most load time.