Agreed. When I left 18 months ago, Virgin had 23 aircraft operating. Based on 8 crews per airframe, there would have had to an expansion in the order of another thirty aircraft for my command to be reality. Bear in mind that a lot of ultra long haul flights have more than 2 crew, three FOs to the one Captain isn't unusual. The airline doesn't have a ratio of one FO for every Captain like a charter or low cost operator.
I have heard that the airline is still quoting about seven years to command at interviews. Utter nonesence in my humble opinion.