What does ACH funding date mean?

I checked SBBT regarding my tax return i efiled thru Turbo Tax.They get the refund from the IRs,deduct the fees for Turbo Tax,and send refund to my bank.When i went to SBBT website,you can enter your personal info and it will tell you is SBBt got the refund from the IRS yet?It says this."Your ACH funding date is 2-1-2011.Does this mean this is when SBBT is going to deposit it?