Is it also the same release or build version? Under Settings-Device Information-software version: I see 2.3.1 (r45611, 12/7/12) on both my Glo and my Touch.
The r, or I assume, release(build version) version has varied on other firmwares with the same #.#.# for the Touch previously, possibly due to geographic concerns...
Seems like Kobo would want to get on top of this all the way down to customer support to save wasting money on unnecessary swap-outs and customers getting psyched out & waiting for replacements that won't solve the problem if it's merely a firmware issue rather than battery issues as was previously thought.
No one is happy about firmware bugs, but they beat the heck out of hardware issues requiring returns, etc. Honestly, I think the hardware should be the last thing to suspect concerning Kobo issues. Both the Touch and Glo seem to be well designed and built. I think they just need a chance to debug and round up all the little beasties they're chasing. I hope most are their bugs rather than third parties over which they have less control, but ultimately they need to be dealt with no matter what their origins.