It seems that something is problematic with your network or machine setup. I just tried it out by pulling a fresh copy of all the sources and it takes about 8 seconds:
destination directory: graphlabapi
requesting all changes
adding changesets
adding manifests
adding file changes
added 2706 changesets with 10085 changes to 2237 files (+3 heads)
updating to branch default
818 files updated, 0 files merged, 0 files removed, 0 files unresolved
8.166u 0.998s 0:33.40 27.3% 0+0k 0+0io 0pf+0w
Best,
DB