Very often the fibre cabinets don't have stickers or numbers, the multiple vents on the front doors give them away and a fan noise if you get up close and personal, tells you they are active. Yes fibre comes from the new cabinet connected to your existing cab.
Your cabinet 6 but be a long way from your exchange for those figures and you must be some distance from cab 6 and fibre twin for your fibre estimate? Normally fibre twins are close to PCP's but maybe there was a technical reason why they couldn't get it close by.
Like you said though 11 is much better than 2.5.
I'm about 700 metres from by PCP, it's fibre twin is about 5 metres away, my estimates are clean down high 30.9 low 22.2, up high 7.3 low 5.6, impacted down high 24.4 low 12.6, up high 6.6, low 3.6
EE ADSL2+ 6.5 Mbps down / 0.92 Mbps up