The discussion centers on the variability of grading in engineering classes across the country, highlighting that average test scores can differ significantly based on factors like class, subject, and instructor. One participant shares their experience of scoring 85 on a thermo test, with the class average being 63, indicating a challenging course. The conversation touches on the concept of calculating averages, specifically the mean of averages, and the excitement surrounding upcoming classes like applied thermodynamics and heat transfer. Participants express enthusiasm for future material, particularly regarding practical applications in a co-op position with Reliant Energy. The thread also notes a surprising distribution in a poll about average scores, revealing that nearly 30% of respondents reported averages of 80 or above, which was unexpected given the perceived variability in grading.