Maybe it's partly because our defence sucked and their backs made huge metres slicing though, and the Tits gave their backs the ball at the end of good shapes rather than one outs and expecting miracles. So as you say, it's the fact their backs got a whole lot more ball with room to move than ours that really tells this story.
As for the metres we made, it was 300 less than theirs. As for post-contact metres, it's what we don't do with them that counts, and, I am equally interested in pre-contact metres as the better metric to predict momentum which we clearly lack big time, and also where we made those metres.
As I looked at this game, it was again our lack of momentum which compressed the space for our halves so they had no time or space to set our edge forwards, our outside plays, so no real shapes, no opportunities for our backs to run, to show their speed. You can't run when there's no room to run.
Metres running into brick walls counts for little