Pues eso aqui "pasteo" los datos de mi conexión Jazztel 6 Megas a ver que os parecen y si creeis que deberia modificar algo en descarga directa (desde rediris) me da una tasa de 425-430 KB/s
Statistics -- ADSL
Mode: T1.413
Type: Interleave
Line Coding: Trellis On
Status: No Defect
Link Power State: L0
Downstream Upstream
SNR Margin (dB): 6.4 7.0
Attenuation (dB): 39.5 17.5
Output Power (dBm): 19.8 12.5
Attainable Rate (Kbps): 7680 928
Rate (Kbps): 7104 800
K (number of bytes in DMT frame): 223 26
R (number of check bytes in RS code word): 16 16
S (RS code word size in DMT frame): 1 8
D (interleaver depth): 64 2
Super Frames: 941 939
Super Frame Errors: 4 0
RS Words: 63988 7981
RS Correctable Errors: 2916 0
RS Uncorrectable Errors: 115 N/A
HEC Errors: 4 0
OCD Errors: 0 0
LCD Errors: 0 0
Total Cells: 40967693 0
Data Cells: 1161967 0
Bit Errors: 0 0
Total ES: 43 0
Total SES: 0 0
Total UAS: 79 0