There are a number of fixes around GRT including up to a 90% decrease in the time taken to run an incremental GRT backup. Please see the following technote which provides links to and details around the changes and fixes in SP2
… and Pat seems to express the whole subject rather better than I do …
3. Symantec Backup Exec System Recovery 8.5 Technical Exam and Assessment
Although each product varies in complexity and depth of technical knowledge, all Symantec Technical Specialist accreditation exams (not to be confused with customer certification), are designed for partners and cover core elements measuring technical knowledge against factors such as planning, installation, implementation and high level troubleshooting. Symantec Partners: See Symantec University for Partners and product Training Path to access the exam and recommended courses.
4. Backup Exec 12.5 Video Product Review by David Strom
The video highlights the key features/benefits of the product.