I noticed there's not as much information regarding staking with the Silk wallet as with some others. For instance, getstakinginfo doesn't return your staking weight, the network staking weight nor an expected time till next stake. Am I right in thinking Silk uses PoS v3 and so coin age isn't a factor?
Yes, no coin age as per the white paper.
A. Taking the Coin Age Out of the Equation.
The most secure way to perform a Proof-of-Stake (PoS)
system is by having as many nodes online as possible.
The more nodes that are staking, the less possibility for
security issues like 51% attacks, and the faster the actual
network will perform transactions through these nodes.
Thus, taking out the coin age will require all nodes to be
online more to get their stake reward. Saving up coin
age is no longer a possibility with the new system that
calculates the chance of staking as follows:
proofhash < coins · target
Note that the system above will not change the actual stake reward.