Lets compare:
Marvel started having decent films starting with Blade, then all the next decade they got the Blade Trilogy, the Spider-Man Trilogy, the X-Men Trilogy (plus one spin-off), two Iron Man movies,two Hulk movies, two Fantastic Four movies, two Punisher Movies, a Daredevil movie(plus one spin off), and a Ghost Rider movie.
You may argue about the overall quality of the films, but from those 21 movies almost half have not being well received critically. But it has produced many of the best films of the genre.
Next you have DC, which pretty much stablished the genre with Superman The Movie, but talking in modern times, around the 90's it had 4 Batman movies, and Steel, in which half of the films where, critically, not well received.
In the next decade it had 2 Batman films, which are among the best films of the genre, one Superman film, which I believe its very underrated, Watchmen, Jonah Hex and Catwoman.
Overall 6 films, in which only 2 of the bunch have met with dissapointments critically.
Also, you may also count into these movies from other imprints:
On the other hand we have the animated films.
I think DC gets the upper hand here with, with many films of great quality overall.
So yes. Marvel has been doing a lot of homework in order to exploit their characters, (some for good, and some for worse) and maybe one of the reasons DC Entertainment division has been created. I think DC has been ver very cautious in some aspects, but I think in this new decade things are going to get very interesting.
Where promises like Avengers, Captain America, Batman 3, Green Lantern, Superman Reboot, and so many others (Flash and Wonder Woman maybe). We'll se which movie formulas work and which doesn't. I think if DC can play their cards right could do so many good things in this decade
And then, there is the animated series department, but I'm not going into this right now, maybe someone can compare.
But the thing is that, it really doesn't matter how many movies are being made, but the quality of them, I believe both companies are doing a good job, and the promises for the next decade are so exciting, it is indeed a good time for being a superhero fan.