Does softraid RAID1 evenly distribute the read load?

[Federico Giannici]

For a decision I have to do, I have to know if the RAID1 implementation 
in softraid evenly distributes the "read" load through all the disks.

So, for example: with a two identical disks RAID1 implementation, can we 
roughly assume that write speed is almost the same speed of a single 
disk while the read speed is almost the double?

I know that reality is not so simple, but it's only to have an "ideal" 
situation to understand the working of the system.

Thanks.