To preach or not to preach?

Reading town centre is getting a bit of an ear bashing from evangelists of late.
On Saturday there were two lots out, one with an amp, one without. The girl with the amp ( yes girl ) was giving it some. So much so that you actually would not understand her if you weren't already programmed with the christianspiel.
The second was an American guy with an awesome cross, I mean made mine look like a toy! Anyway his delivery was un-amplified, measured, audible (projected), full of grace and love as well as truth. I liked him! Preached in tongues for a few sentences - which I found challenging.
He got complaints. And rightly so if you agree that people should be allowed to shop and drink their coffees unmolested by God!
Anyway, I won't be copying him just yet but I was impressed. His name is Eric. His website is simple but nice. http://www.foursmiles.com