At long last some sensible posts on this issue - those who support the BFS obsession with low cost would do well to remember that BMI & other mainline operators have been about for considerably longer than the fledgling locos and as such have a wealth of experience to fall back on.
BMI were in existence when Stelios et al were still in short trousers and have managed to come through some of the most difficult periods in the history of the industry.
Perhaps the best test will be to wait and see whose still in existence in 5 years time.