I agree but I’m no expert. The up to 90% efficacy was a mention in the press release and the 70% average was the main focus (with the 62% efficacy for the rest of the cohorts also mentioned). Some posters seem to want to rewrite history by claiming Oxford / AZ reported that the up to 90% result was the main finding. (That said, I can understand people being a bit concerned that the Moderna and Pfizer trials seem to have been better organised though).
It’s good thst there is a further trial on the half dose plus full dose approach, versus the full 2 doses method, since this hasn’t been researched sufficiently to satisfy all the key regulators).
At the end of the day the MHRA will decide if and when the Oxford / AZ vaccine gets the go ahead in the U.K. It’s still very promising IMHO if the efficacy is 62% or 70%