Potential issue with Comcast "backbone"?

Dear Comcast Network Engineers:
 
I am havind very badly intermittent interent connection with astronomical delays in traceroute. The problem seems to be around:
 
te-0-9-0-1-ar01.pontiac.mi.michigan.comcast.net (68.87.189.241)
te-0-1-0-6-ar01.pontiac.mi.michigan.comcast.net (69.139.254.113)
5 he-4-4-0-0-cr01.350ecermak.il.ibone.comcast.net (68.86.90.113)
 
Please note the output from following 2 ping commands issued from my IP
 
==================
ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8): 56 data bytes
64 bytes from 8.8.8.8: icmp_seq=0 ttl=47 time=29.270 ms
64 bytes from 8.8.8.8: icmp_seq=1 ttl=47 time=29.818 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=47 time=30.845 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=47 time=30.112 ms
64 bytes from 8.8.8.8: icmp_seq=4 ttl=47 time=29.450 ms
^C
--- 8.8.8.8 ping statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 29.270/29.899/30.845/0.556 ms
=============
 
==============
ping 68.87.189.241
PING 68.87.189.241 (68.87.189.241): 56 data bytes
64 bytes from 68.87.189.241: icmp_seq=0 ttl=252 time=13.235 ms
64 bytes from 68.87.189.241: icmp_seq=1 ttl=252 time=12.023 ms
Request timeout for icmp_seq 2
Request timeout for icmp_seq 3
Request timeout for icmp_seq 4
Request timeout for icmp_seq 5
Request timeout for icmp_seq 6
Request timeout for icmp_seq 7
Request timeout for icmp_seq 8
Request timeout for icmp_seq 9
Request timeout for icmp_seq 10
Request timeout for icmp_seq 11
64 bytes from 68.87.189.241: icmp_seq=6 ttl=252 time=6241.562 ms
64 bytes from 68.87.189.241: icmp_seq=8 ttl=252 time=4240.202 ms
64 bytes from 68.87.189.241: icmp_seq=9 ttl=252 time=3239.601 ms
64 bytes from 68.87.189.241: icmp_seq=10 ttl=252 time=2238.449 ms
64 bytes from 68.87.189.241: icmp_seq=11 ttl=252 time=1237.386 ms
64 bytes from 68.87.189.241: icmp_seq=12 ttl=252 time=237.315 ms
64 bytes from 68.87.189.241: icmp_seq=13 ttl=252 time=14.658 ms
64 bytes from 68.87.189.241: icmp_seq=15 ttl=252 time=16.222 ms
64 bytes from 68.87.189.241: icmp_seq=16 ttl=252 time=15.034 ms
^C
--- 68.87.189.241 ping statistics ---
17 packets transmitted, 11 packets received, 35.3% packet loss
round-trip min/avg/max/stddev = 12.023/1591.426/6241.562/2048.759 ms