What is a normal amount of packet loss I should expect with COX internet?

The bucket truck showed up on Monday afternoon but it was before I got home from work so I didn't get a chance to talk to him.  I was still seeing 1-2% loss intermittently that afternoon.  Tuesday evening there was a few hours it was well over 4% and on Wednesday there were times when it was +20%.  It is always intermittent but can last from a few minutes to a few hours.  The last technician left me a card with his number so I called him back and he was surprised when I told him I was still seeing issues.  He said that they would be taking a look at the node and would keep me in the loop.  I emailed cox and they just want to send another technician.  The funny thing about it is when the technician was here the dsl line I was previously using (and currently am still using) went out.  After calling them, having a technician come out, and getting a new modem my dsl internet is better than ever.  Go figure. 

Anyway, I've been researching what could be causing my issues and it sounds like if there is enough ingress on the line to cause me to have packet loss then everyone else on the node should be having the same issue.  Is that how it works?  Is everyone else having the same packet loss but not noticing or caring?  When I went and checked my neighbors line (in the photos above) they didn't seem to be having the same packet loss as me.  Was it just a coincidence or can ingress affect some more than others?  Does COX have some sort of ingress monitoring they do?

It does seem to be correlated with the temperature.  It isn't exactly correlated but I notice on days it is colder that the issues seem worse.  It also seems to come in gradually and go out gradually starting with latency spikes that get worse and worse until it turns into packet loss that gets worse and worse.  Could it be the brand new hardline that was put in is having problems?  What is the likelihood of that?