i'm doing a rig maintenance before i check this... full apt-get update and -upgrade before i install v1.28 but prior to this i thought i'd give the miner a check.. It immediately ramped a 1070ti to 24.5sol/s on Beam, previous version I had was v1.25 and it got at best 23sol/s so after my maintenance finishes i'm hopeful of a few sols more per rig..

edit:

after full apt-get upgrade and update on the rig.. the 1070ti ramped in and runs stable at 24.4sol/s (previously 22sol/s on gminer 1.25)
all other cards seeing similar increases.. however.. this might just be due to updated drivers and not necessarily the miner, but as stated.. from 1.25 to 1.28 the 1070ti ramped in at 24sol/s so i think there is very slight performance improvements in the architecture deployed in 1.28.