They do! I've been on many service calls that ended up having a loose or corroded PoCo connection being the problem.. One of them was at night, Homeowner lost a phase from SoCal Edison... I looked up at the pole & the phase that'd dropped from his house was glowing from all the resistance at connectors for the neighboring houses... If you open up a typical PoCo residential pedestal, usually you'll find signs of something arcing at one time or another.. These are all Al. connections.. Another member on the board here that'd be alot better informed on the PoCo side of things would be Bjarney... I'm just speaking from my own experiance when dealing with the local PoCo's..

The only PoCo I've seen that Ive never had to call out for trouble service was SDG&E...(Not to say they "never" have problems...)But most of their system is copper!