Mediation, BTW, is a very imprecise term because it has so many meanings. I mainly think of it as the process of entering an insightful state through concentration, but the term has generally become synonymous with the relaxation response.
Yes this is true. Not only are there many different types of meditation (as in the official spiritual practice) and relaxation techniques but there are also many "depths" to be obtained.
I first learned it as part of a yoga class in 1972 and I didn't know that it was meditation we were practicing. Since then I have been exposed to many different forms of relaxation techniques (for pain control) , various Indian, Tibetan and Japanese meditation methods, shamanic journeying, ecstatic dance, drumming, chanting to "bells", toning, hypnosis and guided visualizations. Not all at once of course and some only as secondary parts of healing courses I took - (you don't really want to hear me chanting or toning as I am tone deaf) so many have never become part of my personal practice.
One thing I found that many many western people start out using these techniques as part of pain or stress control and if it clicks with them they will eventually deepen their practice.
Also for some people they need movement in order to go into the trance state so that ecstatic dance or exercise works better then trying to make them sit still. One good example of this locally is the "Tam-Tams" on the side of Mount Royal every Sunday in the summer. Several hundred people with drums show up and they play while many people watch, listen and dance. This is a totally un organized event, as long as it isn't raining people just show up with drums, the better players take turns leading and the others follow. The rhythmic drumming of many drums just gets into your system, after a while there is nothing in your head except for the rhythm of the beat and your body starts to move on its own. The city long ago gave up trying to evict them from the park and now it is considered a tourist attraction.
71. The lame can ride on horseback, the one-handed drive cattle. The deaf, fight and be useful. To be blind is better than to be burnt on the pyre. No one gets good from a corpse. The Havamal