IHS removal on ivy bridge and haswell

What are your opinions on doing this on a cpu?

The results seem too good to be true, is it all just a hoax? I would except the temperature to be maybe only a few degrees better.

Also, isn't glue there to prevent dust build up?

https://www.youtube.com/watch?v=XXs0I5kuoX4

Delidding is a great way to get higher overclocks, or just drop temps. The soldering of Sandy and before was much better than the shitty TIM they used on Ivy and onward, and by removing the awful TIM, and replacing it with either a better TIM, or just nothing (even direct die mounts), you can get much better temps.

IHS Removal is pain in the ass.