I think the delay comes from Bookeen and not PVI since "les echos" is already selling
a vizplex reader with the same hardware and the same design (except it's white).
See :
http://www.ganaxa.com
http://www.lesechos.fr/epaper/inscription.htm
You can even compare the speed of the Bookeen GEN3 / Ganaxa GER2 with the old gen of eink :
http://papierelectronique.blogspot.com/