It started acting up at 5pm, sites sometimes loading sometimes not, or taking an age to load, with red x's all over the place etc...
It was really bad just before 7pm so I did a couple of traceroutes.
Code:
Tracing route to www.mit.edu [18.7.22.83]
over a maximum of 30 hops:
1 16 ms 8 ms 10 ms 10.76.32.1
(it paused 24sec here)
2 16 ms 8 ms 32 ms leed-t2cam1-a-ge96.inet.ntl.com [80.0.54.17]
3 12 ms * 10 ms leed-t2core-a-ge-wan64.inet.ntl.com [80.0.241.41]
4 12 ms 14 ms 24 ms lee-bb-a-so-120-0.inet.ntl.com [62.253.185.17]
5 21 ms * 26 ms lee-bb-b-ae0-0.inet.ntl.com [62.253.187.186]
6 33 ms 16 ms 17 ms ren-bb-a-so-000-0.inet.ntl.com [62.253.185.161]
7 30 ms 34 ms 26 ms bre-bb-b-so-200-0.inet.ntl.com [62.253.185.166]
8 27 ms 30 ms 55 ms telc-ic-1-so-210-0.inet.ntl.com [62.253.188.121]
9 35 ms * 30 ms (it paused 22sec here) 195.66.226.185
10 103 ms 96 ms 95 ms p6-0.core02.jfk01.atlas.cogentco.com [154.54.1.5]
11 * 98 ms 96 ms p15-0.core01.jfk01.atlas.cogentco.com [66.28.4.165]
12 97 ms * 96 ms p12-0.core01.jfk02.atlas.cogentco.com [66.28.4.10]
13 106 ms 108 ms * p5-0.core01.bos01.atlas.cogentco.com [66.28.4.117]
14 104 ms 102 ms 106 ms g7.ba21.b002250-1.bos01.atlas.cogentco.com [66.250.14.206]
15 95 ms 106 ms * mit.demarc.cogentco.com [38.112.2.214]
16 96 ms * 98 ms w92-rtr-1-backbone.mit.edu [18.168.0.25]
17 130 ms 107 ms 107 ms www.mit.edu [18.7.22.83]
Trace complete.
(total time 74sec)
-----------------
Tracing route to nancy.harvard.edu [128.103.60.24]
over a maximum of 30 hops:
1 11 ms 14 ms 8 ms 10.76.32.1
(it paused 24 sec here)
2 28 ms 16 ms 16 ms leed-t2cam1-b-ge96.inet.ntl.com [80.0.55.17]
3 14 ms 17 ms * leed-t2core-b-ge-wan64.inet.ntl.com [80.0.241.169]
4 10 ms 10 ms 9 ms lee-bb-b-so-120-0.inet.ntl.com [62.253.185.21]
5 17 ms * 48 ms ren-bb-a-so-000-0.inet.ntl.com [62.253.185.161]
6 34 ms * 26 ms bre-bb-b-so-200-0.inet.ntl.com [62.253.185.166]
7 31 ms 39 ms 28 ms telc-ic-1-so-210-0.inet.ntl.com [62.253.188.121]
8 31 ms 29 ms * (it paused 20sec here) 195.66.226.185
9 102 ms * 98 ms p6-0.core02.jfk01.atlas.cogentco.com [154.54.1.5]
10 106 ms 106 ms * p15-0.core01.jfk01.atlas.cogentco.com [66.28.4.165]
11 104 ms 98 ms 112 ms p12-0.core01.jfk02.atlas.cogentco.com [66.28.4.10]
12 100 ms 100 ms 100 ms p5-0.core01.bos01.atlas.cogentco.com [66.28.4.117]
13 100 ms 106 ms * g7.ba21.b002250-1.bos01.atlas.cogentco.com [66.250.14.206]
14 * * * Request timed out.
15 116 ms 115 ms 119 ms oxgw2-vl-15-core.net.harvard.edu [128.103.15.15]
16 120 ms 139 ms 116 ms nancy.harvard.edu [128.103.60.24]
Trace complete.
(total time 94sec)