Jenny Williams in ComputerWeekly points out what we already know. The iPhone 4 death grip is common in all smart phones. An HTC spokesman:
Quality in industrial design is of key importance to HTC. To ensure the best possible signal strength, antennas are placed in the area least likely to be covered by a person’s face or hands while the phone is in use.
In other words, don’t hold it wrong.
However, it is inevitable that a phone’s signal strength will weaken a little when covered in its entirety by a user’s palm or fingers. We test all of our phones extensively and are confident that under normal circumstances reception strength and performance will be more than sufficient for the operation of the phone when network coverage is also adequate
Just like the iPhone 4. HTC in July:
The reception problems are certainly not common among smartphones
For now, all smart phones have similar reception issues depending on how the phone is held in the hand, signal strength, location, and other factors.