FioS speed issues

[nesis]

I just got FioS hooked up yesterday. I have the basic package for now 5/2 and I am getting more than my 5 mb down speed  however my upload speed seems to be lacking on this site and alot of other speed test sites (varies from 400k up to 800k up  ) the only site that I seem to be able to upload at about the expected speed it on broadband reports which gives me about 1.7Mbps up. Does anyone know what might be going on?

ISP: Verizon

Service: FioS 5/2

OS: Win XP Pro

I have tried using drtcp however I still cannot get the upload speed quite right

Here are the results of the test speedguide test https://www.speedguide.net:8080/

TCP options string = 020405ac0103030301010402

MTU = 1492

MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.

MSS = 1452

MSS is optimized for PPPoE DSL broadband. If not, consider raising your MTU value.

Default TCP Receive Window (RWIN) = 307824

RWIN Scaling (RFC1323) = 3 bits (scale factor of 6)

Unscaled TCP Receive Window = 38478

RWIN is a multiple of MSS

Other RWIN values that might work well with your current MTU/MSS:

511104 (MSS x 44 * scale factor of

255552 (MSS x 44 * scale factor of 4)

127776 (MSS x 44 * scale factor of 2)

63888 (MSS x 44)

bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 12312.96 kbps (1539.12 KBytes/s) @ 200ms

Your TCP Window limits you to: 4925.184 kbps (615.648 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 121 hops

TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349) = 00000000 (0)

Speed test results from this site:

:::.. testmy.net test results ..:::

Download Connection is:: 5371 Kbps about 5.37 Mbps (tested with 5983 kB)

Download Speed is:: 656 kB/s

Upload Connection is:: 834 Kbps about 0.83 Mbps (tested with 1496 kB)

Upload Speed is:: 102 kB/s

Tested From:: https://testmy.net (Server 1)

Test Time:: 2006/10/01 - 7:23am

D-Validation Link:: https://testmy.net/stats/id-2XB36VHU5

U-Validation Link:: https://testmy.net/stats/id-PCBQFZA6R

User Agent:: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322) [!]