I have never used tounges in front of other people, i just use it in prayer when im alone, most people don't know i have it. I know its gotten out of hand in some churches, and its probably abused but im not one to judge. I can't say if theirs is fake or different to what i have.
All i can tell you is my experiences, sometimes when i pray in tounges, i have no idea what im saying, but all of a sudden i'll just start crying and feel a strong sense of forgivness.It helps me open up to god.
Now i have had a very hard upbringing, much bullying from people and depression most of my life, i have always had a very hard time opening myself up or understanding what exactly is going on inside of me, or putting my feelings into words. Praying in tounges has helped me alot with that.
Sometimes i wonder, perhaps thats the reason why some people get the gift of tounges, because they are the ones that need it the most, as opposed to most people who have no problem expressing themselves.
I know most people think they are spirtually lesser then those with tounges but i think its the opposite. I think those with tounges need it the most, i think its to help them grow spirtually, where as other people have no problem in that area.