What are the current useless terms in this "audio world"

The most meaningless, ridiculous and all out absurd is to try and equate a difference heard as a percentage! A poster might say the new speaker cables were 8 to 10% better or the upgraded DAC sounded 15% more detailed. Really.

I think this is bandied about to appear very astute and able to accurately discern to the n'th degree the difference. Nuts.

Then 'gears', puleeze. To say "I'm gonna buy some new gears" is just wrong. It's quite acceptable to say for instance "You're welcome to come over for a listen to my gear"

And while in gripe mode it is astonishing that most people get 'then and than' mixed up. In conversation your meaning will get across but when written down just appears as dumb.

Then: has to do with Time
Than: has to do with Comparison

Not sure what exactly are the parameters and numbers but, for example, Silversmith says that their Fidelium speaker cables are 3 times the performance of his v pricy cables at one tenth the price.
Think it has to do with amount of signal transferred.

@nonoise  - sorry - realized that just as I hit post. I’m slow but I get there. 

@feldman, no worries, It happens to me all the time.

20 gain room responce.