How does this compare to the mid or low delta range?

Hmmm. Here's a shot at this question:

Theta sleep seems to heal mostly our minds, while delta sleep seems to heal mostly our bodies.

Or,
Theta sleep = mind sleep.
Delta sleep = body/mind sleep.

Time in theta erradicates mental fatigue, while time in delta erradicates body fatigue as well.

Different frequencies of delta do different things. For instance, I know

that 1hz stimulates human growth hormone,
that 1.5hz releases the hold of trauma,
that 2.5hz releases pain-killing endorphins,
that 3.4hz is 'deep restful sleep'.

Delta meditation is far far deeper sleep. Though some healing occurs during sleep, delta meditation allows the body to repair itself much more. In my own experience, scabs are lesser, the skin is more radiant after an exfoliation, muscle soreness dispereses, actually my muscles seem to be growing much larger lately, just trough meditation!

Think of Delta meditation as sleep times FOUR. Not only does one hour of delta reduce sleep need by 4 hours, but it also appears to HEAL the body 4 times as fast. (at least, this is my experience.)... and you don't get that in theta... you just get a mental recharge and maybe some surfacing traumatic memories that bring you greater emotional freedom.

Interesting that comas can go as low as 1hz once every month! But .5hz is usually the lowest we tend to go in delta meditation. Most mindmachines do not even go below that setting. It's very difficult to maintain that low especially at the lower carrier frequencies... must become accustomed to it gradually as with Centerpointe cds.

How do you distinguish a dead body from a bed? At 1hz another interesting thing happens... you and your surroundings... there is no longer any distinction.

Delta Meditation... it's some pretty cool stuff...covers all the bases admirably... And I've tried quite a few meditation methods. Of all, this seems to be the best investment of my time, the most results generating, and the most difficult. It kills so many birds with one stone PLUS it gives you EXTRA time in your day (can't beat that!)

It scores a 9.5 out of 10 in my book (10 being reserved for the ultimate floatation tank!)