Incoming Attack Speed +50%

[WaY]

That bonus means that Attack missions would take 50% more time. So the SPEED will be DECREASED.

It should be
Incoming Attack Time + 50%
or
Incoming Attack Duration + 50%

[Hexxus]

That bonus means that Attack missions would take 50% more time. So the SPEED will be DECREASED.

It should be
Incoming Attack Time + 50%
or
Incoming Attack Duration + 50%

WaY,
What you've mentioned is very similar to my topic here:
viewtopic.php?f=14&t=164
I too have found this display of information to be confusing...