Yes, given the context that AmericanChopper was principally talking about roads (and advocating that cars should be prioritised). If you include non-carriageway provision then the Tube, bus and walking are and have long been dominant in London.

3.11 appears to cover the whole day rather than just the rush hour, and again, the context of AmericanChopper's comments was "commuters". 3.5 in the original report (search for 'Traffic in the City 2018') gives more context as to how modal share varies throughout the day.