According to Cannata they are inferior
, but according to established manufacturers they are top of the bill bearings used in the most demanding industry locations , friction less plus they have a gap filled with air between parts and we all know mechanical vibration doesnt travel well through air neither does it through oilfilms :
http://www.kracht.nl/index.php?l=_en&id=2&c=24
Air Bearings is the leading manufacturer of the recently advanced air bearing technology. We are committed to providing our customers with the most precise bearing system available spread over many existing and emerging markets around the world. Advanced technologies have led to major breakthroughs and have given way to new markets. These developments have increased the need for precision tools and equipment. We have combined our past experience with today's technologies and implemented military spec materials including aluminum, titanium, and graphite in producing our state of the art OAV Air Bearing products
OAV Air Bearings do not have mechanical contact between elements and benefit from an air-film averaging effect. Furthermore, due to an absence of mechanical contact, the OAV Air Bearing has virtually no friction to generate heat and cause wear.