The Japanese forces that invaded the Philippines were the equivalent of 2 and 1/3 divisions with supporting troops. The US had one reinforced division, 1 Marine regiment and 1 cavalry regiment present. The Philippines army had about 10 divisions in existance with these in varying states of readiness ranging from marginal to useless.
I have to agree with Roddoss that MacAuthur is greatly overrated as a commander. I have no doubt of his personal bravery but this counts for little in generalship. I would say that I find his Chief of Staff, Sutherland to be an incompetent martinet of the highest order and largely responsible for many of the disasters that befell MacAuthur early in the war. It was only MacAuthur's bulldog loyality to those around him that kept Sutherland on. A more competent general would have sacked the man after the foul up with the USAAF in the Philippines.
General Kenney, later the commander of the USAAF under MacAuthur in the SWPA recounted in his biography General Kenney Reports that on one occasion he got into it with Sutherland. Kenney took a blank sheet of paper and put a dot in the middle of it with a pencil. He shoved the paper at Sutherland and said "You see this sheet of paper? It represents what I know about air power! You see that dot? That's what you know about air power!"