Yesterday, we had a guy run email@example.com w/ 1.75 60' (e90 xi AT) with only jb4 e85 50/50 and DCI.
As a reference regarding cobb. I ran 13.10@106 w/ 1.85 60'. I'm also e90 xi auto. Cobb stg 1 aggressive and drop in filter (this is a 93 octane tune).
That 12.7 is FAST for being in Denver. That will take almost anything on the street, maybe not top end but from a dig.
A mid to high 11 second NA car at sea level would be on par with that 12.7. There
was a viper running mid to low 13's all night. Heavily modded cts-v's running low 12's, new 5.0's with s/c and slicks running low to mid 12's. All these cars were trapping 110-115 though.
2008 335xi AT
Cobb AP stage 1, drop in filter, the rest stock
firstname.lastname@example.org w/ 1.86 60' (5,800' altitude)