I'm confused (again).

I ususlly use nearly 5GB /mo on my Data Connect acount. Some months a little more but most a little less. I have never received a "Warning about Data Paln Overage" and never been charged extra when I've been over 5GB. My current status according to the AT&T web site is...

XXXXXX's Wireless Usage
Data Connect Including Unlimited MB
XXXXXX's  Current Usage Summary - Data
Data

5457.98 MB
5457.98 of
Unlimited
Current Usage displayed as of:
August 07, 2010
Important Information
Next billing cycle starts:  August 12, 2010

So is my account one of the fabled grandfathered unlimited data accounts?

Or is this what even those who get warnnings and extra charges see when they check their account onlne?

Thanks in Advance --Talon Dancer