It's all rather subjective, but hopefully encouraging.
[Ed to add: Take those ratings with a grain of salt. Sierra Road is also given a 5 in this database, which makes it in theory only as tough as OLH. Not !!! ]
Jobob,
Thanks for the link to the climbing database, as well as your edit. Geez, I'm planning to climb OLH tomorrow for the first time ever. When I saw it was rated the same as Sierra, I started to have second thoughts.