Some of them would have you believe that anything above 80 beats per minute, and the song loses any spiritual significance, instead leading the elect astray. It cannot have the spirit of God, it offers no hope, etc. Some would make the argument about the intensity at which some instruments are played, etc. It is far more likely that just as God allows a myriad of denominations to exist for every taste in the worshipper - from the traditional structure of the Episcopalean and Catholic churches to the most Charismatic Holy spirit miracle type church. I submit that the same criteria should be applied to musicians.
Style is meaningless - it is the gospel message that is important, and the walk of the musician.