Not the same results I get so I would have to ask how you are doing it with examples and tell us if you are measuring all with the same tool. For example, Here are the wc counts for a text file I created, imported into Libre Office, then saved as an odt and as a doc file and finally re-saved as a txt file (the one with the 2 appended.
larry@hammerhead:~/Documents/Misc$ wc Ed*
8 306 19456 Edmund Prescott Thiel.doc
80 324 17242 Edmund Prescott Thiel.odt
24 168 974 Edmund Prescott Thiel.txt
24 168 961 Edmund Prescott Thiel2.txt
136 966 38633 total