Mining for 13 hours at 5.2TH/s, expected time to share 2.0hrs....
Actual share obtained so far: 1 total (1 ophaned, 0 good) ......
Pure bad luck or setup issue???

Seriously, should have got 6 shares under the "expected" scenario.
Just so you can compare here is mine... at 4.0TH
I some days get a share an hour and other days 1 share per 6 hours.....
Graphs
Version: unknown 7032706f6f6c2d6e2d6d6173746572
Pool rate: 2.20PH/s (11% DOA+orphan) Share difficulty: 8500000
Node uptime: 11.7 hours Peers: 6 out, 0 in
Local rate: 3.52TH/s (3.3% DOA) Expected time to share: 2.9 hours
Shares: 4 total (0 orphaned, 0 dead) Efficiency: 112.5%
Payout if a block were found NOW: 0.0441345 BTC to xxxxxxxxxxxxxxxxxxxxxxx. Expected after mining for 24 hours: 0.0401 BTC per block.
Current block value: 25.09223858 BTC Expected time to block: 12.9 hours
hope it helps......
(I used to get worried but I just leave it run and some days really make up for the bad ones... after a month of pure p2pool I am ahead of any pool I used to join!)