Jubilee Line E/B service just before PM peak.

I've noticed recently that the service towards Stratford from Waterloo/London Bridge at around 1530-1630 has been quite unreliable recently. I've seen gaps as large as 8 minutes in the departures and if you get a train that terminates at North Greenwich, the following service to stratford is packed, certainly from Canary Wharf onwards. I understand that they need to turn back trains at N. Greenwich to increase the W/B frequencies but is this prioritised over the E/B service? Having frequently used the W/B service in the past I get the impression that the E/B service is worse - have I just been unlikely or is this consistently the case?


Thanks in advance,

theswissmonkey