Your benchmarks are completely wrong and misleading, sorry :)
For example, it does not take "Original CLZF C#" 8 seconds to compress 150 KB. That would give a speed of 10 KB/sec. But in reality it compresses at something like 30 MB/s.
That's a factor 3000 wrong.
Also, "QuickLZ C#" is alot faster at compression than "Original CLZF C#" but 2-3 times slower in your benchmark.
Finally, SharpZipLib does not decompress at just 10 KB/s, but at more than 100 MB/s. A factor 10000 wrong.
I think your timer resolution might be too coarse. Try executing each compression/decompression in a loop multiple times or use high res timer.