The IQ of the 22mm was pretty good too, slightly better than the 18-55mm.
How was the 18-55? They didn't have it in store, and they don't sell a 18-55 kit in the US so I just got it with the stock 22 (which exceeded my expectations).
Dislike - AF was slow. I'll try and be specific here. Even when the subject is already close to being in focus it still hunts back and forth once or twice and then locks. Average time to lock on was between 1 to 2 seconds. Lighting conditions were average. You will not be able to take a quick snap with this thing.
1-2 seconds? My experience is usually about 1 second, maybe a little faster. When using the outer focus points near the corners, I agree, 1-2 sec is more common but center point is quite fast actually (assuming your subject is not vastly out of focus- even then, it's not too bad). That said, when I tested it in "rush mode" I did notice a shutter lag (delay between confirmed focus and pic taken) which I hope they can address, perhaps in firmware.
Where it REALLY slowed down was when I switched to the FlexiZone-Multi mode and the face detection. If your scene is OOF and there are a lot of near and far subjects in your shot...be prepared to wait several seconds, especially in low light.
The EF adapter is pretty heavy. Probably weighs more than my 50mm f/1.8 II.
Interesting...they didn't have the adapter on hand either but I'd love to try it with my 40 2.8. Seems like it would fit well...
Here in Japan, I visited a photo gallery, and one of the gentlemen who's work was at the exhibition was toying with his M, attached to it was a massive (or with the small body looked that much larger) telephoto. He was taking pictures of me and a few others with it having some fun. For people with a wealth of EF lenses it would be tempting, but man, it doesn't stand out any less, is now awkwardly front heavy, and less controls + no VF would mean slower operation anyways... yeah basically what everyone's been saying, but I saw it happening in the wild!
No point in attaching a big lens to this camera. Defeats its purpose! May as well be using a DSLR.