Coded Logic,
What you feel is right with regard to all those who meditate, yet not right with all those who REALLY meditate. The difference is like that of smelling a plastic flower and an actual flower. Just saying all are going to Colleges and studying is not enough! Why do students fare differently in same college, studying same syllabus, under same professors? Very rarely one may get 100 out of 100! When I did my post-graduation on YOGA, I got only 80%, but my friend got 99 out of 100--first time in the history of that University.
Going to Delta frequency is not that easy [people find it difficult to reach even Beta, Alpha, Theta frequencies! If so, how can they reach Delta? But, once you are through, then you are in a wonderland--inexplicable, you are in bliss, you experience a presence of real love where your problems get solutions automatically. Yet going to Delta with some selfish motive will defeat its very purpose--it's a stage where agape meets THE AGAPE!