Week starting 14 September 2009
Rank by Speed (seconds)   Rank by Success Rate (percentage)
Rank Target Response Time (seconds) Rank Last Week   Rank Target Success rate (%) Outage Hours Rank Last Week
 1 Facebook 0.42  1    1 Blogger 100.00 0  5
 2 Ning 0.63  2    1 LinkedIn 100.00 0  1
 3 Plaxo 0.72  3    1 Plaxo 100.00 0  1
 4 Windows Live Spaces 0.83  4    4 Classmates 99.90 0  12
 5 MSN Spaces 0.85  5    4 Delicious 99.90 0  5
 6 Delicious 1.04  6    4 Digg 99.90 0  5
 7 LinkedIn 1.18  7    4 MSN Spaces 99.90 0  5
 8 Yahoo Groups 1.30  9    4 MyYearbook 99.90 0  1
 9 Blogger 1.34  8    4 Windows Live Spaces 99.90 0  1
  Social Networking Index 1.37      10 Yahoo Groups 99.80 0  19
 10 MyYearbook 1.37  10    10 YouTube 99.80 0  16
 11 Classmates 1.40  10    12 Bebo 99.70 0  14
 12 YouTube 1.43  12     Social Networking Index 99.68 0  
 13 Twitter 1.63  13    13 Facebook 99.60 0  5
 14 Bebo 2.11  14    13 MySpace 99.60 0  5
 15 Tagged 2.21  15    15 Tagged 99.50 0  14
 16 MySpace 2.58  16    16 Ning 99.30 2  17
 17 Flixster 2.86  17    17 StumbleUpon 99.20 2  11
 18 StumbleUpon 3.29  18    17 Twitter 99.20 0  18
 19 Digg 4.20  19    19 Flixster 98.80 1  12