through experience of myself, i have always seen better 60's through feathering of the clutch...it was mandatory in the laser because it was AWD but even in a 240sx, 200sx, and fwd DSM. i was cutting high 1.9's-low 2.0's and 2.0-2.1 in the fwd dsm, probably due to worse weight transfer.

problems i see with dumping the clutch - harsh engagment, your rear end may not like, not to mention axles or tranny.

problem with feathering - go through clutches a little quicker, all be it i had my DSM for 7 months or so and the clutch never started slipping after probably 20-30 5600RPM launches in it