I know that some of you suddenly get interested in timings when it comes to M9, so here are my fairly accurate (I think) measurements for the Gatti/VPO M9: I - 29:15; II - 15:35; III - 12:35; IV - 26:10
Keep in mind that these numbers are probably a bit lower than if this were a commercial recording, as the record companies usually count a bit of empty space before and after each movement.
If my math is wrong anywhere, please correct me.