There was a published list, perhaps partial, of the precincts in which Republican observers were thrown out. It should be simple enough for someone with a little time to check the voter turnout in these precincts and see how they stack up. I would hope the local GOP has already done so.
From list published at Powerline (http://www.powerlineblog.com/archives/2012/11/are-the-democrats-trying-to-steal-pennsylvania.php)
W, D O%/R% O#/R#
Ward 6, Div 11 98.86/1.14 519/6
Ward 12, Div 17 98.16/1.34 587/8
Ward 20, Div 1 89.98/8.79 440/43
Ward 24, Div 9; 99.64/0 275/0
Ward 29, Div 18 98.34/.33 297/1
Ward 32, Div 13 100/0 220/0
Ward 32, Div 28 99.78/.22 454/1
Ward 39, Div 1 68.29/30.66 196/88
Ward 43, Div 14 99.38/.62 323/2
Ward 56, Div 1 74.73/24.18 272/88
Ward 56, Div 22 52.76/46.98 201/179
Ward 65, Div 19 61.47/36.39 201/119
source: http://filter.phillyelectionresults.com/