Hi Kort Idont use HD cards yet and have been looking at them as I plan to get a new Camera I read somewhere there was an issue with Olympus cards when using the Pano mode that it slowed them down but this was for an older model than your camera.. Looking at some of the specs here were the results...

 

Sandisk Ultra II C/F Card @ Write 9 mb/s & Read 10mb/s
Lexar 80X WA Pro C/F @ Write 12 mb/s & Read 16mb/s
Olympus xD Card @ Write 3mb/s & Read 5mb/s

Danny O'Byrne  http://www.digitalartzone.co.uk/

"All the technique in the world doesn't compensate for the inability to notice" Eliott Erwitt