These are vented seats not cooled seats and yes what you feel is normal. IMO basically a wasted option that Audi just implemented to check the box that it is offered on the car. My Infiniti M37S had cooled seats and you knew it.
2014 A6 Prestige
Ice Silver on Black w/ Driver Assist, Full LED, Black headliner
3M Crystalline 40% Tint all around, Akebono Euro Ceramic brakes
Hartmann HS5-209-GA:M wheels and Michelin Pilot Sport A/S 3 tires
Most recent rides:
2011 Infiniti M37 Sport, 2009 Acura TL SH-AWD Tech
2008 Acura TL Type-S (#2), 2008 Acura TL Type-S (#1), 2007 Acura TL Tech
2007 Camry Hybrid (don't ask)
2006 Acura TL Tech, 2004 Acura TL
2002 Infiniti I35, 2000 Infiniti I30
and over a dozen more before these.