Org is very active, high profile project, the number of changes from previous major release are just amazing.
git diff release_7.01 release_8.0 --stat [snip] 352 files changed, 119010 insertions(+), 80849 deletions(-)
git diff release_7.01 release_8.0 --stat [snip] 352 files changed, 119010 insertions(+), 80849 deletions(-)
I'm not exactly sure what that git diff --stat command pasted above actually compared, but I don't think it's correct.
http://orgmode.org/cgit.cgi/org-mode.git/tree/lisp?id=5ef07d...
B) 7.01 was released almost three years ago. A number of things have changed in that period of time, and it's reasonable to expect that 352 files were created, edited, deleted, etc.