Beersmith Measured Mash Efficiency

I brewed today and I have a question about the result of my measured mash efficiency. Normally, my mash efficiency is in the mid to low 80's using my fly sparge method.  Sparging 12.5 gallons took about 15 minutes longer than usual.  With today's batch, I reached 93.6 for my measured mash efficiency.  The pre-boil gravity was higher than expected too... 1.056 compared to an expected gravity of 1.049.  OG was higher than estimated OG as well... 1.059 compared to 1.056. 
Is it even possible to reach 93.6 in a homebrew environment?

Recirculating the wort threw my HERM's system while mashing gives mid 90s for Measured Mash Efficiency.