I disagree, I thought the whole point of the new opening window was that it was extremely thoroughly researched (it took months and months to put together), and IIRC was more of a 'worst case scenario'. I remember the new chief executive saying something like that. It's already slipping massively from that. Looking at page 37 you can see what a mess things are. Bond street is totally unfinished, whitechapel not much better, other stations far off completion. Only custom house is anywhere close to finished. It's projecting basically a year delay to get the stations finished (not sure what the original date was meant to be for that in the programme). Regardless, the stations weren't even considered to be the most at risk parts of the programme, dynamic testing and railway software/signalling was. Consider that there is still no opening date for 345s to Heathrow which is by itself nearly 18 months late and I don't think that is looking too great either. I'd strongly suspect it being at least 2022 for first operating date after reading that report.