Thanks everyone for commenting! I have aggregated the data provided by everyone above, performed the analysis, and posted the results in a new topic. Please visit this new post to view the results.
If you got straight-run meat birds please post how many females and males you had, the type of bird, and the hatchery.
If enough people give me data, I will be able to statistically prove* whether or not "straight-run" is really what we think it is.
In general, we'd expect our straight-ruin...