Everyone, there are some great first drafts, I have posted individual comments below for each of you, and really look forward to seeing another round.

#1Your approach suggest you understood the concept of progressive accelerated change, but the execution doesn’t work yet. Mirroring the C shape in your line of triangles sounds like good design, but makes it feel complicated, and a bit on the curly cue side. I think we may have misled you, by marking complex as design attribute, when actually we are looking for a strong, but simple design to communicate a complex concept ( that mathematical change builds on itself at potentially stunning rates) Your use of typography is elegant, but seems better suited to traditional stationery than to a screen. Ideally the final image would work even on a pda.

#2You nailed the clarity and simplicity we were looking for, and the triangle imagery is strong, but the end result falls short of what I would have hoped. Here are two things that could strengthen it: a) make the triangle progression in the opposite order, we want the big triangle at the front of the pack. B),Add a second color. The turquoise could work for part of the design, but when used for the whole things, feels more like a Hawaiian travel brochure, than serious business.

#3I really like much about this design. The tag line is especially well done. Have you considered showing (rather than just implying ) the gradual change in triangle size. Out name change in delta, really means change in change, or change times change, times change. I love the use of the gray, but think it’s got the wrong placement. IN is the weakest word in the title, not the one we want to draw the eye to. Can you place it behind delta? I’m of two minds about the main typography. In general I think sans serif fonts are more thinking, and much better for use on electronic screens, where much of our stuff will be seen, but the look you have seems to be working, so I’m inclined to want to keep it. By putting the gray behind the delta, that would change the typography for that one word to be the strong sans serif look and may achieve exactly what we are looking forward. I hope you’ll give this a second round.

meant #4 for earlier comment

#5 & #6 That use of lines and shading is sophisticated and makes the image pop, that’s the positive side. Unfortunately, the 3 dimension triangle looks like a pyramid, which evokes antiquity and resistance to change, exactly the opposite of the feel we are looking for. Is there a way to put the sophistication to work to evoke a more contemporary, change driven feel?

Sorry, just figured out the sorting. Number 1 equals number 3 now. Number 2 is still number 2. Number 3 is the old number 1. And 4 and 5 equal 5 &6. confusing? I hope not.

#7 by gheist now client #1. I love this design. It plays with the concept of delta. Maybe I'm being to greedy but is there any way to "pop" it a notch?

#9 by akronix now client #2. Have to make the work delta "pop". Perhaps grey shading the whole word "Delta" in a triangle? Needs something.

#16 by schnabbelbob now client #3. Appreciate the echoing triangles instead of pyramid. However design doesn't do it for me. Need "cleaner" and more "sophisticated" lines and typography.

From now on we will stay with three design concepts so as not to waste your time.

You can actually rank more designs than 4. It helps our rankings even if we don't get the top 3 places. Getting 15th place is better than not getting any place when we spent the time to design something for your contest. Have fun with your new logo. =)