This is all true...
Most people that delete it do it for looks...another reason to delete it is if you're doing a header install and the tube either breaks or wont thread into the new header...
In order to delete is you must turn the egr option off via a tuner otherwise you're car will have hesitation issues...a lot of people will claim you gas mileage will lower too..but the most possible amount of mpg's you will lose is 1/4 of a mpg...I've turned plenty of egr systems off and its very rare to see a loss in mpg's...
In a nutshell egr deleting is for looks