Most definitely you will see different speeds with different browsers. Also matters what time of day and the sites traffic.
I've almost been meaning to post asking something similar to this.
has been acting TOTALLY weird depending on what browser I use for a while now.
Used to be Opera was my fastest browser on that site, although it's mentioned that Opera is supposedly the worst browser to use there. Lately now, IE blows any other browser away. In fact, I'd almost call that site totally inaccurate when using it! My upload speeds are not usually anywhere near the 4Mb I'm supposed to be getting when using anything other than IE.--
The Firefox alternative.
»www.mozilla.org/projects ··· amonkey/