[atlas] Sudden increase in RTT to a.root-servers.net

Hi, This is not urgent and probably not important. I have noticed that with the turn of the month (31st-> 1st) the RTT from my probe (#1118) to a.root-servers.net has gone up a lot. It went from ~32ms to ~115 ms (with a max of 494 ms). I checked the statistics of a few other public probes ("randomly" picked) and could not find that pattern repeated there. So what does this tell me? Has my ISP downgraded one of their uplinks? There is only three other probes here in Canada and they are not public, so I can't check their numbers. Maybe one of you has a few moments to enlighten me. I try to understand and learn from my probe's stats. :-) TNX Daniel AJ