I agree. My main quibble. Shutter lag when pre-focussed is higher than DL4/LX3 and even the DP2. But it seems not to be a problem when using MF mode. I don't understand why there would be a difference.
I'm quite curious about these comments regarding a lack of responsiveness.
I had the DLux4 and E-P1 out on the counter next to each other at the local dealer last week. With the standard zoom on the E-P1, it seemed marginally faster than the DLux4 in terms of shutter lag and certainly faster shot to shot. The E-P1 feels very similar to the G1 in this respect, which in turn feels very much on par to the L1 and E-1 DSLRs.
Our perception of lag and responsiveness is complex. The E-P1 does make a different and more complex shutter sound compared to these fixed lens/leaf shutter cameras. I wonder if that is confusing people's perceptions ... It is a large (by comparison) focal plane shutter which closes, opens and closes, then reopens for each exposure. The sound is inevitably rather different in timbre and duration.
There is also an inevitable slight lag in display refresh if you leave these cameras (G1 and E-P1) in Continuous drive mode. The reason is that C mode forces a short between-frame review for a fraction of a second to the EVF/LCD display buffer where S drive mode does not (if you have AutoReview turned off, of course).
Anyway, I'm thinking out loud. Yesterday I was shooting a bunch of photos with the G1 and L1 side by side, each fitted with a different focal length lens. I saw little to no practical difference in either shutter lag or shot to shot responsiveness, and I am quite certain that the DLux4/LX3 could not keep up with either given those cameras' lack of buffered write capability.