France and Britain started there major push within Peacetime limits in 1937 and first fruits of that coming online in 1939. Germany was already maxed out due to financial constants. Britain and France had only just got the boot up the ass to build up. I have asked this question in the Past and the main stumbling block is Germany going Bankrupt and having to invade when it did. Get past that the biggest winner due to ramp-ping up Production is France.
France in May 1940 was only just starting to get it's more advanced weapons systems in Numbers, This had 2 effects they where not around in numbers and nobody had built up experience in there maintenance and use, no build up of spares and knowing what parts wore out and so forth.
OTL for example French Fighter availability was less than 29% and Operations per day was rare to get about 3 a day mostly 1-2 flights a day. Compared to 4-6 actions a day from a bf109( later called the Me109). Most of this was due to everything being new and rushed and no infrastructure being in place example, Dewoitine D520 just before the German invasion was being produced at 10 per day well in excess of the 150 a month Production of the Bf109.
The Ground crews where just getting used to this new advanced machine.
So the training of Maintenance crews, Pilots and supporting infrastructure was not yet in place to take advantage of the Potential numbers,
You delay the start of the war by 6-12 Months Germany is screwed as it will face a proportionally much better prepared France and Britain due to there combined industrial potential far outstrips Germany without the resources of Poland and Western Europe. Time is mostly on the allied side.
German loses will be higher in Poland as they have probably got the 144 Morane-Saulnier M.S.406( probably the slightly better M.S.410) in service. That is so much of an advance of the PZL types. Flip side the time of the 1941 invasion of France the Germans are getting Me109F's and first of the Fw190's ( OTL There were 102 Fw 190 A-1s built between June and late October 1941)
And yes I am biased you get things like the VG-33 in production and fighting
http://img475.imageshack.us/img475/8235/vg33highrez8lm.jpg