Typically it depends on what Poco area I'm doing the change in if I splurge for something expensive to tie the overhead in with....
So Cal Edison can take FOREVER to get out.. if they ever do! (I came across a 10 year old panel that had blue wirenuts on the service drop!) In these area I typically use "Insultaps" or "Polaris" taps...
San Diego Gas & Electric, LADWP, Anahiem Power, Glendale power, etc are pretty fast at getting out, so if I can use something a little less pricey, "safely", I will... (typically a double lug similar to those in underground splice kits)

-Randy