No! You talking to me?
I was telling OP what I predict happening to him on 21CN.
As for me on 21CN WBC, my Upstream oscillates between 888 K Interleaved and about 1.2 Meg Fast Path. Long time since I was on 448 K if ever.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 19 Meg WBC