Jesus of course said this about the Pharisees who rejected Him as Son of God.
YUP.
I think it's important to insure that such groups are spiritually, Scripturally balanced; humble, loving, warm.
Nothing stinks worse than a very skewed, sick Pentecostal group.
But nothing is more Christlike or powerful than a balanced super anointed one, either. And nothing grows the Body of Christ more, either.