Dworak is trustworthy - he is a moderator on the forum, he is an established script trader, and has a reputation which pre-dates Windbot.
As he said, though, make sure you confirm that you are speaking with the right person as people are often making fake Windbot, Skype, Email, and Facebook accounts in order to try scam his customers. When you speak with him, if you will send him money or account info, try to ask for at least a message on Windbot forums to prove that it is him. Sadly, one of the things that comes with a good reputation is a lot of people looking to abuse that reputation.