MenuMeters & Text

Lots of OS X geeks I know use Menu Meters to monitor the goings on for their machines. But here's a nuance that remembered last week, watching one of my colleagues give a presentation. I can't remember exactly where I heard (overheard?) this, but apparently it's quite relatively expensive to paint letters and numbers on the task area of the menu bar as opposed to graphics. Not sure why, and it may just be a rumor, but in any case, I tend to keep the graphical version of the CPU meters up, not the numeric one, just in case.