I have known Clint since 2005 and can absolutely vouch for his expertise at ThinkSEM. He understands PPC like most others do not.
Don’t take my word for it. Check this out! Two days ago while both of us were in Seattle for SMX, the President of a staffing software company (Gregg) decides to make a YouTube testimonial video. Clint knew he was getting some sort of testimonial, but had no idea it would be via YouTube.
Gregg also embeds the video on his blog. Way to go, Mr. Danks!