Am I on ADSL2???

[#1]

I have recently upgraded from Prem 1 to Extra as ADSL2 has been enabled in my area - but can honestly say I can't tell any difference, if anything slightly slower now.
I am using a NG DG834G, my current stats
/usr/sbin/adslctl: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 0
Channel: INTR, Upstream rate = 448 Kbps, Downstream rate = 3360 Kbps
Link Power State: L0
Mode: G.DMT
Channel:       Interleave
Trellis:       ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 11.3 18.0
Attn(dB):         63.5 31.5
Pwr(dBm): 18.3 12.3
Max(Kbps): 3648 916
Rate (Kbps): 3360 448
Would turning off interleave make an speeds differences?
I have BT iplate and wiring is all fine - I have tested on extension and master socket and the speeds are no different.  I am under the impression that I am far enough away from the exchange for ADSL2 not to make an difference. 
My connection is very good and I get very few disconnects if any - just want to get a little more speed so I can at least stream iplayer!
Any help/ ideas most appreciated.

[#2]

Your on a longish line, Sadly adsl2 will be of no benefit to you.

[#3]

Hi techniz,
Well, firstly, you are definitely on ADSL1, and yes with that attenuation I wouldn't recommend going on to ADSL2+
Secondly, You're getting a sync rate of 3360k on a line attenuation of 63.5dB with an 11dB SNR. I think that's pretty amazing!
I'd struggle to know what else we could do for you.
Jojo