Here's a topic on official forums which may be of help to you, some people are posting times that it takes with yews. However, you can never be too sure if they are telling the truth, or lying to make the d axe look good so more people will buy it, thus inflating the price.
http://forum.runescape.com/lang/en/aff/runescape/forums.ws?17,18,143,39746171
You have to remember though, that a simple 3 tests is not a very good indicator of the speed comparison of 2 axes.... as getting logs is based primarily on luck/randomness.
Adr1k wrote:
I have heard those rumours about d axe flying thru logs..especially on yews. Well, i bought one the other day to try it out for myself..
I actually thought, 3 months, i have 99 wc, 5 mil cash + d axe. Think again..
So i started wc yews (thats my plan for 99 wc)and i seemed to be getting them fairly slow..nothing noticably fast. So i decided to take out a stopwatch and time how long it takes for a load of yews.
The following are the results:
D axe --- 7 min 40 sec
7 min 50 sec
8 min 10 sec
7 min 30 sec
Rune axe -- 8 min 20 sec
8 min 05 sec
7 min 00 sec
7 min 20 sec
Wicked Sus wrote:
I'm going to do 3 inventories with each axe.
These results are with 96 woodcutting with 4 yews to myself:
DRAGON AXE - AVERAGE = 5 minutes, 43 seconds.
6 minutes, 12 seconds.
4 minutes, 26 seconds.
6 minutes, 31 seconds.
RUNE AXE - AVERAGE = 7 minutes, 5 seconds.
8 minutes, 32 seconds.
7 minutes, 51 seconds.
4 minutes, 53 seconds.