Wrong ! Dot 5 is not compressible at all ! Remember your science class's, liquids by their nature are not compressible. Do you honestly think the manufacturers would use something that could compress in any brake system ? If they are frothed up with air then it can compress ( as air compresses) . That is why it is not used in anti-lock brake systems. The air would settle out within hours though.
Also who ever wrote that article is a moron ! DOT 5 not used in race cars. REALLY ! Some of the most expensive performance cars come with DOT 5. Ever heard of Lamborghini ? or Porsche ?
And the kicker, DOT 5 cannot handle heat ! Are you kidding me ! What do you think is the major draw of Silicone ? The ability to handle HEAT ! This kind of crap really makes me angry !!! People who write misleading or outright lies in articles should be taken out side and shot !