The better test you can have to monitor your DSL speed is online gaming.
Last month my ping (response time) was around 200 at best.
Now I'm running Call Of Duty 4 on US servers below 150 all the time :)
I noticed this improvement on the 1st of April.
I'm getting above 75kbps on my torrents too.

So yes ,Qtel did a speed upgrade,at least for the 512Kbps subscriptions.

Note : I don't have Mozaic

Hardcore Gamer!