Here are two key findings in the link Iains posted. Firstly about Boris


Shifting the focus from those who voted Conservative in 2017 to those who intend to vote Conservative if a new election were called yields very little difference: 60% want him[Johnson] running the Brexit process, 49% want him running the country, and 44% want him in charge of both.


Now about Corbyn:


Figures are rosier among those that say they would vote Labour in an upcoming General Election. Six in ten (62%) would want to see Corbyn running the country, and 47% want to see him in charge of Brexit, while 44% want him running both


We have from other surveys that there is a fairly equal four way split between parties, so the chances of the Conservatives or Labour winning the next election are too close to call at the moment, if those surveys are believed. The great hope for Conservatives is that replacing May with Boris will change this, but that is yet to be proven, especially if Boris does not leave the EU come October 31.

So what those two extracts say is that Johnston has 49% support for running the country after Brexit, and Corbyn 62%.

It doesn't really support the assertion 'poor old compo barely qualifies as an also ran', does it?