Request for information: ISPs and P2P throttling

[Laevantine]

Name of ISP: RCN Boston
Country of Residence: United States
When does the problem occur?: Whenever I'm logged in, since around 3am EDT on Monday, September 1, both before and after Tuesday's maintenance
Ref#: I sent their customer service a note on Twitter, but likely won't get a response until tomorrow.

I have no idea if this will help, but this is the WinMRT report for about 5-6 minutes of checking, during which I had two lag spikes but no disconnect:

|------------------------------------------------------------------------------------------|

|                                      WinMTR statistics                                   |

|                       Host              -   %  | Sent | Recv | Best | Avrg | Wrst | Last |

|------------------------------------------------|------|------|------|------|------|------|

|                                  DD-WRT -    0 |  455 |  455 |    0 |    4 |  222 |    2 |

|                   No response from host -  100 |   91 |    0 |    0 |    0 |    0 |    0 |

|             bvi200.aggr2.sbo.ma.rcn.net -    0 |  455 |  455 |    9 |   21 |  236 |   14 |

|         tge0-1-0-0.core1.sbo.ma.rcn.net -    0 |  455 |  455 |   20 |   32 |  249 |   23 |

|         tge0-0-0-1.core1.nyw.ny.rcn.net -    0 |  455 |  455 |   22 |   35 |  252 |   30 |

|        tge0-1-0-2.core1.phdl.pa.rcn.net -    0 |  455 |  455 |   23 |   36 |  251 |   31 |

|         tge0-1-0-3.core1.lnh.md.rcn.net -    0 |  455 |  455 |   20 |   31 |  249 |   22 |

|      tge0-0-0-7.border1.eqnx.va.rcn.net -    0 |  455 |  455 |   19 |   32 |  248 |   20 |

|            equinix-was12.ip.tiscali.NET -    3 |  407 |  395 |   24 |   34 |  296 |   30 |

|            xe-1-0-0.mtl10.ip4.tinet.net -    3 |  407 |  395 |   41 |   56 |  273 |   48 |

|                 ormuco-gw.ip4.tinet.net -    3 |  407 |  395 |   45 |   57 |  278 |   51 |

|                             192.34.76.2 -    3 |  407 |  395 |   46 |   57 |  278 |   47 |

|                          199.91.189.234 -    3 |  407 |  395 |   44 |   56 |  692 |   51 |

|                           199.91.189.74 -    3 |  407 |  395 |   46 |   56 |  277 |   55 |

|________________________________________________|______|______|______|______|______|______|

Kinda seems like that equinix-was12.ip.tiscali.net is where the bottleneck starts.
EDIT: So I ran WinMTR on the IP I was assigned while I was playing, and noticed two things. One, when my lag spiked there was definitely packet loss up the chain starting at the tiscali.net hop. Two, the number of lag spikes shot up when I ran a dungeon via the duty finder, compared to just milling about doing quests etc.
Sounds like either there's a routing problem at that step for either everybody, or specifically RCN.
SECOND EDIT: I made a character on the JP servers (Ultima, specifically) and tested things out there. I didn't have the lag spike/discon issue and my ping to it didn't have any significant packet loss, so again, looks like that one hop between me and the NA/EU data center seems to be the issue.