Is anyone else experiencing poor performance on Snap? Especially at this time of the night? 8:30pm-11:00pm.

My latency keeps shooting through the roof as such.

Pinging www.snap.net.nz [202.37.101.49] with 32 bytes of data:
Reply from 202.37.101.49: bytes=32 time=686ms TTL=61
Reply from 202.37.101.49: bytes=32 time=754ms TTL=61
Reply from 202.37.101.49: bytes=32 time=822ms TTL=61
Reply from 202.37.101.49: bytes=32 time=695ms TTL=61

Ping statistics for 202.37.101.49:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 686ms, Maximum = 822ms, Average = 739ms

Dlink - G604T
SNR Margin 10 - 12
Line Attenuation 14 - 8
Data Rate 8160 - 768

On the surface it appears to seem like exchange congestion because yeah it's busy time of the night, but what makes me doubt this is that for the last 3 months it's been perfectly fine absolutely no congestion regardless of the time of the day. It's not until now that this issue has arisen, This makes me doubt exchange congestion as I do not feel this degredation would set in as rapidly as overnight.

At the moment Snap helpdesk are passing it off as both exchange congestion and/or my hardware. I've checked my own hardware and I do not believe it is at fault as I don't think it would fault like this within a constant time frame and then be absolutely fine at all other times.

Any help if anyone has any ideas would be appreciated.

Thanks.