AF speed experience between lenses

Hi folks,

I'm new to the MFT world and am now using the Oly E-PL5.  It came with some kit zoom lens, but I also purchased the Pan 20mm f/1.7 and the Oly 45mm f/1.8.

I've observed a noticeable difference in AF speed between these two prime lenses, with the Oly 45 being significantly faster.

Just wondering if I can borrow some experience from those who have tried various lenses over the past few months/years.  How would you rate the relative focus speed between the following lenses.  I've read a lot of reviews on the Internet, so I have a good sense of the consensus around image quality, sharpness, CA, etc. of these lenses, but I'm trying to get at relative speed from those who have used these lenses in the real world.  The reviews might say things like "fast focusing", but most reviewers use similar adjectives to describe both of the lenses I already have, and I think these perform very differently in terms of real-world focus speed.

Anyway, here are the lenses I'm interested in:

Oly 12mm f/2.0

Oly 45mm f/1.8

Oly 75mm f/1.8

Pan 20mm f/1.7

Pan 12-35 zoom

Pan 35-100 zoom

How would you rank them on focus speed? Does your ranking change depending on dim lighting versus daylight settings?

I'm thinking of keeping the two primes I have now, and then complementing it with the Pan 35-100. But, if the focus speed on the zoom is significantly slower than the Oly 75, then maybe I'll just stick with primes and get the Oly 75.

Also, I'm a Canon user and have owned and used a number of lenses on good bodies (1D3, 1D4, and now the 5D3), including the 24-70 2.8L, 70-200 4.0L, 135 2.0L, and 85 1.8. For those who are familiar with how these Canon bodies/lenses handle, how would the Pan zooms and the primes listed above?

Sorry, I know I'm asking a lot of questions, but I figure there must be folks who have a lot of experience with this on this forum....

Thanks much,

Will