Proposed Canon
At level five, it can pop a stack of eight pikers or one of six stabbers per turn, or one Gump every third turn. Ossomer feels an deep emotional attachment to this city. He had expressed a hope that if he was ever forced to make a last stand for Jetstone, that it would occur at Dhrystone.summer-updates-040
...tall, hard, chiseled, majestic, and quietly, implicitly violent."
Dhrystone, according to Ossomer, pops "the finest soldiers in Erfworld". This may mean that they begin at a higher starting level or have above-average stats for units of their type and level; assuming Ossomer's description wasn't just a romanticism.
 Real-World References
The Dhrystone benchmark is used for measuring computer speed (which is itself a pun on the word "whetstone".) Additionally, Drystone (without the 'h') refers to construction using cut or uncut rocks without mortar or cement, just fitting together.