It became obvious fairly quickly that Canada water really wasn't designed for the volume of use it now has during the morning rush hour. I also find that much past 8:00 in the morning and the chances of easily getting onto an East bound Jubilee line train reduce dramatically.
As noted in the evening it seems ok although the Southbound Overground platform gets very crowded. In contrast to all the above I am still amazed by how politely everyone queues at Canary Wharf in the evenings.