Sorry, no. TypedPollingResultSet[x] is the root name the adapter uses for each result set returned. That's baked in.
Regardless of how to accomplish it, you will have to create a new schema with the updated name. If you copy the Adapter Schema, you can just change the name there.
Your options are:
1. Map the result to a friendly format. Using the copy, use the Mapper's shortcut to Map by Structure to get a one-to-one mapping.
2. In an Orchestration, case the original Message as XmlDocument and change the node's name. Then use the updated XmlDocument to create the new Message.
3. Pipeline component, intercept the steam and change the name with a XmlReader/XmlWriter or similar technique.