We did some updates with regards to the routing for FB specifically, so there should be a general improvement.
Would you mind running a traceroute to Facebook.com?
C-C02N11XUFD56:~ cc616404$ traceroute facebook.com
traceroute to facebook.com (69.171.230.68), 64 hops max, 52 byte packets
1 192.168.1.1 (192.168.1.1) 1.685 ms 1.244 ms 0.972 ms
2 * * *
3 jhb-in2.ip.adsl.co.za (169.1.5.30) 15.202 ms 18.935 ms 14.238 ms
4 jhb-up8b.ip.adsl.co.za (169.1.5.56) 14.182 ms 14.425 ms 15.471 ms
5 * * *
6 41.169.57.218 (41.169.57.218) 19.493 ms 14.678 ms 14.433 ms
7 if-ae-7-0.tcore1.jso-johannesburg.as6453.net (41.206.178.29) 23.098 ms 21.848 ms
if-ae-7-0.tcore2.jso-johannesburg.as6453.net (41.206.179.13) 15.959 ms
8 if-ae-4-2.tcore1.klt-cape-town.as6453.net (41.206.178.2) 188.675 ms 187.929 ms 186.370 ms
9 if-ae-4-2.tcore1.klt-cape-town.as6453.net (41.206.178.2) 185.045 ms 206.729 ms 187.059 ms
10 if-ae-5-2.tcore2.pv9-lisbon.as6453.net (80.231.159.129) 175.711 ms
if-ae-5-40.tcore2.pv9-lisbon.as6453.net (80.231.159.89) 193.509 ms
if-ae-2-2.tcore1.pv9-lisbon.as6453.net (80.231.158.5) 174.983 ms
11 if-xe-0-0-0-2000.tcore1.pv9-lisbon.as6453.net (80.231.158.1) 183.212 ms
if-ae-2-2.tcore1.pv9-lisbon.as6453.net (80.231.158.5) 182.497 ms 178.568 ms
12 if-ae-1-3.tcore1.sv8-highbridge.as6453.net (80.231.158.30) 180.552 ms 184.713 ms 185.265 ms
13 if-ae-2-2.tcore2.sv8-highbridge.as6453.net (80.231.139.1) 184.492 ms
if-ae-19-2.tcore2.l78-london.as6453.net (80.231.138.22) 175.120 ms 176.167 ms
14 if-ae-17-2.tcore1.ldn-london.as6453.net (80.231.130.130) 179.536 ms 186.733 ms 187.502 ms
15 if-ae-17-2.tcore1.ldn-london.as6453.net (80.231.130.130) 180.967 ms
195.219.83.102 (195.219.83.102) 189.031 ms
if-ae-17-2.tcore1.ldn-london.as6453.net (80.231.130.130) 182.295 ms
16 ae-1-9.edge2.sanjose3.level3.net (4.69.209.181) 320.617 ms
195.219.83.102 (195.219.83.102) 198.604 ms 183.337 ms
17 ae-1-9.edge2.sanjose3.level3.net (4.69.209.181) 307.887 ms
ae-3-19.edge2.sanjose3.level3.net (4.69.209.189) 317.280 ms
ae-1-9.edge2.sanjose3.level3.net (4.69.209.181) 417.095 ms
18 ae3.bb04.sjc1.tfbnw.net (31.13.26.166) 408.228 ms
4.53.210.78 (4.53.210.78) 313.822 ms
ae2.bb03.sjc1.tfbnw.net (31.13.26.164) 316.408 ms
19 ae2.bb03.sjc1.tfbnw.net (31.13.26.164) 314.978 ms 320.137 ms 309.171 ms
20 ae1.dr13.prn1.tfbnw.net (31.13.27.143) 337.457 ms
ae4.bb04.prn2.tfbnw.net (31.13.27.182) 326.887 ms
ae20.bb04.prn2.tfbnw.net (74.119.76.54) 336.549 ms
21 * * ae2.dr12.prn1.tfbnw.net (31.13.28.37) 324.479 ms
22 * * *
23 * * *
24 * * *
25 * edge-star-mini-shv-17-prn1.facebook.com (69.171.230.68) 340.961 ms 323.669 ms
C-C02N11XUFD56:~ cc616404$