Mary Jo Catlett took 8 days, Tom Kenny took about 5 weeks, and Carolyn Lawrence took about 8 months..I sent her a message from her website. When I wrote to them, I introduced myself, told a little bit about myself, and said what I like and admire about them. Since you don't live in the US you would have to put in IRCs (International Reply Coupons, so they can exchange them for stamps). They won't reply without you paying for the return postage.
Addresses:
Tom Kenny
Generate Management
1545 26th Street
Suite 200
Santa Monica, CA 90404
USA
Mary Jo Catlett
Daniel Hoff Agency
5455 Wilshire Blvd.
Suite 1100
Los Angeles, CA 90036-4201
USA