I joined the DXO scheme middle of last year( 2015),
my application was submitted some time end of 2014.
following are time lines i experienced:

psychometric test: near immediately after you submit.
1st interview: 3.5 to 4 months after test
informed of Unit review: within 2 weeks of interview
Negotiation of salary: 1 month after unit review
Signed contract: approx 6 months after first applied.

With 3-5 years of experience I received a mid 4K salary.