For those of you who didn't listen to it, his point is essentially that he originally thought Jaiman was an introductory module, but he later came to question this because so many of the creatures in the world were so high-level. He wonders if the creators of Jaiman really intended players to start much higher than level 1 (say level 10), because otherwise they can't do much.
I think that there was some acknowledgement by ICE designers that RM lacked good, low-level starter areas. I think later editions of the Master Atlas introduced the Bay of Izar as a starter area for example; I also used Quellbourne for the same purpose; and this is one of the reasons I like the Green Gryphon Inn too. So while I think the podcaster has a legitimate point, I also think it is one that was to some extent acknowledged in later material.