PZ do you mean cluster feeding re block feeding? We feed every 1.5-3 hours but mostly 2 - 2.5 hourly. Yes I have a good fast supply which came in super fast after my CS.
When I first noticed the problem I described it as DS being a 'lazy feeder' so perhaps that's what's going on. Did you express before feeding? Not sure when I would find the time as it feels like I'm feeding all the time anyway!
Also he is so quick in demanding a feed when he wakes I didn't want to keep him waiting and being distressed while I pump.