How frequently do vault APRs update?

Its seems like the vault APRs could be more accurate if there were a set time period that it pulled data from. Lets say the average APR over the last week instead of from inception? That would factor in the weight of how much yDAI or yETH was in the bucket and how well the programming is handling the scale. If the first weeks are weighted the same as the last week it’s likely to be skewed, right? The more coins in the curve pool would limit the number of possible transactions for lending/investment, right? I’m imagining the APRs will drop very quickly once big fish roll in.

If you would like more comprehensive data, there are several good options: