Yes, it is decidely true. While Jet (the database engine that MS-Access uses by default) uses an SQL-like language, it isn't the real McCoy. MS-SQL implements nearly all of the SQL-92 standard, and plays by the rules nearly all of the time.
With the Professional version of MS-Access, you get MSDE included on the CD, but not automajikally installed. You can install it (and I'd strongly recommend applying Service Pack 3), and it will give you almost exactly the same functionality as MS-SQL, but pared down to run on a workstation.
-PatP