Slow Single Click Fails to Work

[2CV67]

I already asked about this in Launchpad Question #256474, but with no answer.

If I single-click on an Ubuntu Unity Launcher Tile, I expect that to launch the application.

It only does so if I can click-&-release extremely rapidly (less than one tenth of a second - who can measure?).

At my normal click-&-release timing, the action is interpreted as click-&-hold, so the Tile just wobbles (preliminary to being moved in/from the Launcher) and the application is NOT launched.

For personal reasons, I am not able to click-&-release any faster.
There must be many other people (older, handicapped, etc) in the same situation.

We need to be able to reset the threshold between click-&-release and click-&-hold to get satisfactory functionality with Unity.
In the same way everybody can already reset the timing for double-click to suit their equipment & physiology.

The same problem occurs with Window Menus in Unity (with Menus on Windows) where a slowish single click fails to open the Menu & is interpreted as a desire to move the Window.

For information, MS Windows 8.1 works perfectly for me, with the same hardware...

Ubuntu 14.04.1

unity: Installed: 7.2.2+14.04.20140714-0ubuntu1.1

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.2.2+14.04.20140714-0ubuntu1.1
ProcVersionSignature: Ubuntu 3.13.0-40.69-generic 3.13.11.10
Uname: Linux 3.13.0-40-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Mon Dec 1 13:41:47 2014
InstallationDate: Installed on 2014-10-23 (38 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)