Dont think interleaving would make that much difference on fibre?

My ping on Sky 40mb fibre to UK QL server:

Pinging 94.76.229.7 with 32 bytes of data:
Reply from 94.76.229.7: bytes=32 time=8ms TTL=59
Reply from 94.76.229.7: bytes=32 time=8ms TTL=59
Reply from 94.76.229.7: bytes=32 time=8ms TTL=59
Reply from 94.76.229.7: bytes=32 time=8ms TTL=59

Ping statistics for 94.76.229.7:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 8ms, Maximum = 8ms, Average = 8ms

It does make a difference but ISPs can't really control it because it is controlled by the DLM(This is one advantage of LLC). Also interleaving on VDSL shouldn't be as bad as interleaving on ADSL2+.

So you got FTTH or FTTC?
FTTC is not all fibre - it's only fibre to the curb, from curb to home it's still copper (but I guess you knew that).

Interleaving does make a difference with VDSL. Depending on the interleaving level, it'll cost you between 5 and 16ms compared to fastpath adsl(2+). This is why I prefer 16/1 MBit/s ADSL with fastpath over 50/10 MBit/s VDSL with interleaving.

Oh yeah I have FTTC (Fibre to the Cabinet) i think FTTH is pretty rare in the UK due to shit infastructure. On ADSL I had 8/0.6 Mb/s and around 40 ping.

Nice. I wish German FTTC / VDSL was this good in terms of ping.

just get a fiberoptics connection