No, because even with a conversion, the number is still being interpreted as just a raw number, not a counter. What it represents doesn't matter - I can have it represent bytes/sec, sessions/sec, failed logins, toilet flushes/sec, or a running total of how many beer bottles get thrown into the trashcan. There is a fundamental difference in how data should be gathered between different data types in SNMP. As a reference, look at the Universal Device Poller in NPM - when you set up a custom poller, you have the option of choosing whether the data is a 'Rate', 'Counter', or 'Raw Value'. Depending on what you choose, the data will be interpreted differently.
Here's a list of SNMP data types:
http://www.webnms.com/cagent/help/technology_used/c_snmp_overview.html#datatypes