I've put my S9 along with kano since 14th Jan, and now my shift performance is 9.15, is it normal or am I getting sth wrong, how long til fully ramp up?
You can actually estimate how far you are.
The 'ramp' is of course 5Nd which is 500% diff.
If you find the nearest block after you started, then add up the % for all blocks after that block, then add the % total we are now (~248%) if that adds up to over 500% then you're done.
You also will have some % before that block was found so you can estimate that also.
So to give an example assuming someone started 14-Jan 6:00 UTC
The first block found after that time was 504174 at 2018‑01‑14 10:22:29
After that block there's been 2 blocks 46.284% and 202.868% = 249.152%
The current block is another ~248% so 249% + 248% = 497%
504174 was found 4hrs 22min 29sec (15749sec) after 6:00 UTC and was 9.007% and a total of 8hrs 31min 10sec (30670sec)
So mining was approximately 15749/30670 of that 9.007% or 0.513 x 9.007% = another 4.625%
So 497% + 4.6% is of course more than 500% so the 5Nd 'ramp' would be 'just' passed if you started mining at 14-Jan 6:00 UTC and had a consistent hash rate with no outages since then (ignoring the 5-10min pool outage since that was everyone)