Does absolute polarity matter?

After read David Kan's review of Trends Audio TA-10 Tripath amplier (http://www.6moons.com/audioreviews/winsome/mouse.html) I reversed the polarity of my speaker connections from my bel canto eVo 6 amplifier. My eVo 6 drives my front three speakers of my 6.1 channel A/V system and I use a Marantz SR 7200 as my preamp. So far everythings sounds at least as well as before the change. But I'm curious as to why my Sunfire Jr. subwoofer is not out of phase now. The sub is connected to Marantz's main speaker output using the speaker level input on the sub. Has any other class T amp owners tried reversing the speaker polarity or absolute polarity of your systems and heard any difference?