Agree.
X25s don't write as fast as some SSDs, but the read is good and the access time is lower than any other SSD I've seen, which makes them fast for daily use.
Other SSDs seem to have focused on the write speed numbers, this is meant to impress the masses.
Actual performance is achieved by a combination of things.
IMHO, the write speeds, (not the most important factor, read and access time is more important for the large majority of users) are at a level where the increase in performance is not noticeable to the human senses, and can only be seen in benchmark scores.
Benchmarks use different methods to test, the manufacturer uses the benchmark that gives them the highest number, which is used by marketing to increase sales.