Good point. That just means that we cannot accurately speculate on when things will enter service. It does mean however that the US military should probably prepare for the worst and hope for the best. That way if Russia fails to keep with our ambitious schedule, then the USA will simply be superior on an unreachable level, where as if Russia by some miracle or otherwise (Indian and Brazil funding for ex.) does manage to stay somewhat on schedule, then the US military will be prepared to counter a peer 5th gen. threat.The quoted timetables of Russian defence aviation industry can't be taken seriously. They lack the financial investment in the industry to achieve them and have been promising equally ambitious but never meet schedules in the past 10-15 years.
My knowledge of economics is rather limited, so I won't comment on this besides my eternal motto time will tell. But I really don't think that economic discussion belongs in this forum.Now after the credit crisis with the Russian government spending all the energy sourced cash reserves on trying to keep private industry solvent its likely the Russian military are going back to the dark old days of the 1990s. The biggest loser, after Iceland, of the credit crisis would appear to be Russia.
To be more specific, if the Russian economy collapses again, then we can expect the military to be in trouble (again). If it doesn't then we can expect a significant military revival. We can look at both cases and see what to expect but we don't need to debate the economy beyond that point simply because iirc this forum is dedicated to military discussion. So lets explore both possibilities and thus come up with likely courses of action that the USA should take in response to both, or possible in the absence of a clear knowledge which of the two will happen, the course that would leave out the chance of the USA having problems dealing with the situation that does develop.