Well, looking at her CV, she has a BS, and some real world experience. Couple that with self-motivation, and the interest to do another year just to get started in CS -- that would probably place her in a different category from "went to Uni, graduated". Which is
one definition of junior dev.
That said, looking at her github profile, it does give me a "junior dev" feel (not really a bad or good thing, in and of itself. Better to hire a promising junior dev, than a poor "senior" dev, I think).
If nothing else, I'm much more looking forward to my own prospects if/when I start looking for a job in earnest...
I've never quite got the salaries in the UK/London -- those that I've seen advertised or on sites like glassdoor. They seem unreasonably low?
Granted, I'm looking from Norway which has a decidedly strange/flat pay structure -- starting salary for a junior dev here would (probably?) be around a little below the median wage, to 1.5 the median wage (across all categories of jobs[1]) -- and the effective ceiling not that far above.
I do find it interesting that with her clearly limited programming skills/experience, she was valued so high. I don't think it is unreasonable, but it doesn't really match what I've seen elsewhere -- I'm surprised so many companies clearly seem to see what they need, and are willing to compensate accordingly.
[1] http://www.ssb.no/a/aarbok/tab/tab-190.html Norwgegian table. So for a single person 25-30 years old, in 2011, median income after taxes come to 264 200 NOK, or ~37K USD/23.5K GBP. Almost double that for income before tax.