Hello Saijanai,
Actually, what you are claiming is directly contradicted by the scientific literature. The literature has found that the major types of meditation, of which there are 4, maybe 5 have some overlapping effects, but mostly differentiated effects. In each of these forms there are physical effects on the brain, with some regions being reduced in size, and others increasing in size. In some regions the interconnectivity is increased, and in others, it is decreased. Generally, the activities of amygdala are reduced, with other regions, such as the pre-frontal cortex, anterior cingulate cortex, left anterior insula, and others all increased.
However, I am not aware of any literature that discusses the effects you are describing for the default mode network. Additionally, I am not aware of any papers that describe the chain of events you describe. In fact, it is almost impossible at this time to get the level of resolution in real time that is required to track brain activity in the way that you describe. There is emerging research, and I do mean emerging as it just appeared within the last two weeks, that claims to be able to track the firing of neurons with a much higher degree of magnification.
Additionally, I think you may be mixing your scientific evidences. When you describe the effects on brain regions that is different data and different techniques than brain waves which you quote later.
Last, the scientific evidence actually does not support your conclusion that one kind of meditation stands out. Instead it supports a practice that incorporates different techniques if you want to develop the power of your mind more fully.
Yours, in service,
Jason