You're basing your assertion that Labour are going great guns on things that only really matter to the Labour party (membership numbers etc.). The Economist article is basing their assertion on their competence in opposition. You're pleased that you're 2nd in a 2 horse race, I get that, but it's not really much of an accomplishment. I also get that you're more interested in Labour being in power than being an effective opposition. You're as much a Labour tribalist as you are an Everton tribalist, but most people aren't of the same mindset.
I'm not sure what looking like an effective/competent opposition looks like to you though Bruce?
For me it's partially about rebuilding the party (that was nearly bankrupt in recent times) into the biggest in Europe. More importantly though it was about increasing the vote share and number of votes. Would you agree this is a reasonable summation of what an effective opposition should be judged against?
If you do, then Labour achieved it's biggest % share of the vote in over 15 years (or 20 years if you are measuring England/Wales in a post SNP/nationalism world). There is only 1 election in the last 50 years we have received a higher number of votes (and again it's questionable whether that would be the case for England/Wales, it may well be the biggest in 50+ years). It's also the biggest increase in votes and share of votes in over 70 years.
Thats not to say I agree with everything Corbyn does (as it happens I don't). However there is a big difference between me subjectively saying I don't like or agree with something and ignoring the objective reality that this is one of the best performing and effective oppositions in the history of British politics.
The reality is that many people within the establishment can't seem to comprehend that. They assume because of their competency they should be winning. They haven't stopped to consider that their ideas must be really unpopular if they cannot get many votes. No doubt in papers like the economist or the Guardian that will make me a cross between some sort of veggie terrorist and a Mao secret police agent.
In the real world though, Labour are doing very well in opposition. Most voices in the "centrist" media either can't grasp reality or don't wish too. And when challenged on this launch a multitude of attacks upon people for telling the truth.