I was shocked to learn from HTCClassAction that many of HTC most powerful devices have not performed the way it should be.  Some of HTC older models are even faster than their own newer models like the TyTN II vs Magician.  Competitors using the same chipset are performing  faster as in the case of the LG KS20.

Below is the verbatim extract of the news article from HTCClassAction which you will find self-explanatory.  I cannot vouch that what they say is true.  Only HTC can explain which I hope they do:

“The latest SmartPhone and PocketPC devices from HTC (High Tech Computing) are supposed to be the most powerful devices on the market. And in theory, they are indeed real powerhouses of mobile technology. There’s a catch though: HTC has neglected to include the necessary drivers needed for the devices to come to their full potential.

What does this mean?
This means our really expensive HTC phones (the TyTN II is about $700) are grossly underperforming.  In fact, in many things, these devices operate even slower than HTC’s (and competitors’) two years older models.

The drivers (small pieces of software that govern your device’s hardware) in question are responsible for all drawing operations. This means absolutely everything having anything to do with putting something on your screen is affected. This includes normal programs, video playback, games, taking pictures, etcetera. If it’s on your screen, it’s affected. This makes the devices feel really slow and unresponsive.

There is also a problem with the touchscreen driver, which predates the driver issues mentioned above. This issue comes down to your device slowing down to a crawl whenever you touch the screen. This is really apparent when you are playing a video and use an onscreen slider to adjust the volume, for example. When doing this, the video will as good as halt.

Which devices are effected by this?
At the time of this writing, to the best of our knowledge, all HTC devices based on the MSM7200 and MSM7500 chipsets from Qualcomm are affected. None of these devices seem to use the hardware accelleration provided by the ATi Imageon hardware. These devices include, but are not necessarily limited to:

• HTC TyTN II (MSM7200), also known as:
  HTC Kaiser
  T-Mobile MDA Vario III
  AT&T Tilt
  Vodafone v1615
• HTC Touch Dual (MSM7200), also known as:
  HTC Nike
• HTC Touch Cruise (MSM7200), also known as:
  HTC Polaris
• HTC Wings (MSM7200), also known as:
  HTC S730
• HTC Titan (MSM7500), also known as:
  Sprint Mogul PPC-6800
  Verizon XV6800
• HTC Vogue (MSM7500), also known as:
  HTC Touch P3050 (this is not the normal HTC Touch)
• HTC Libra (MSM7500), also known as:
  HTC S720
• HTC Iris (MSM7500), also known as:
  HTC S640

As this affects all HTC devices based on the MSM7200/MSM7500 chipsets, you might reach the conclusion that it is a problem with the platform or chipset. This is however clearly not the case, as HTC’s competitors have no trouble getting all of this working right, and blazingly fast - take the LG KS20 for example!”