Originally Posted by ImmortalDiotima

To be honest... I'm not splitting hairs. I'm merely suggesting that I think the amount of metal bands with indiscernible lyrics has the majority over the amount of metal bands with lyrics you can understand.

For instance, the only genres (that I can think of) in which you can usually hear the lyrics are classic metal and power metal. Classic metal is a dead genre. There are no new classic metal bands and there are very few modern bands who imitate classic bands such as iron maiden or black sabbath. That leaves one genre... power metal... which is not (in my experience) the largest of the metal genres. You could even include thrash as having usually clear and i would still say that:

Death and black metal (I think) are the largest genres (and include many sub-genres) and usually you cannot hear the lyrics. Therefore... I do not consider it to be splitting hairs to suggest that the majority of metal bands that exist or have existed have vocals with indiscernible lyrics.