Recently I experiencing a 2s to 3s lag with Skype calls. Finally found out why. This is what you see when you have this lag:
$ pacmd list-sink-inputs | egrep '(current|requested)' current latency: 2004.02 ms requested latency: 66.00 ms
The solution is to remove loading the module-suspend-on- idle in /etc/pulse/default.pa.
