Why does line count change so much from D2007 to D2010?

Question

Our app at work is a huge project with over 3000 units, weighing in about 3.5 million lines of code.

...or at least it was when we were compiling it under D2007. We

Answer 1

Doesn't D2010 support generics? I think some of the libs have been replaced by generics, which could account for additional lines that appear to be parsed if it counts the "virtual" lines it's using.