can't say that I recollect the 32GB V-Plus's spec's.. but it sounds like you're using HDTune/Tach to test with. If that's the case then yes.. those area's containing data on the disk will show reduced reads. Same goes with any other SSD tested with data on it.
That's part of the reason that HDTune/Tach sucks for SSD testing and is usually better to stick with the other SSD friendly benchmarks like ATTO, AS SSD, Anvil's.
Just keep in mind that benchmarks write a lot of usless trash and further degrade a smaller SSD rather quickly with some idle time garbage collection time being the best routine for recovery. Trim alone will not always be the fastest/best method as GC does a few more things than TRIM ever will at the controller/physical level.
And yes.. GC is still the best/most comprehensive recovery method with any Indilinx based drive. Hope that helps