This is what's posted on Allears about the chef change in August 2007:
The new executive chef for Jiko - The Cooking Place is Brian Piasecki. This is a good news. Brian comes to Jiko from Le Cellier Steakhouse at Epcot's Canada and the Rose and Crown at Epcot's United Kingdom. Previously, Brian was a chef at the Coral Reef Restaurant at the Living Seas. Under Brian's leadership, the reputation of Le Cellier has reached a point that makes Le Cellier one of the hardest-to-get dining reservations at Walt Disney World. Brian replace Anette Grecchi Gray, who left Jiko for an opportunity with Carlson Companies, Inc., the parent company of T.G.I. Friday's, Radisson Hotels, and other restaurant, hospitality, and travel services brands. This information was announced Thursday evening, August 2, at a Jiko Wine Dinner. (Thanks to Werner Weiss for this news!)
I wonder if we'll see Jiko start to climb to LeCellier's heights, now that they have his chef.....