My roadie has brifters (Shimano 105) but my commuter has Tiagra which has brifters with thumb levers. We went out to do a long ride one day after I had been riding my commuter a lot and I panicked and told DH "OH NO!!! My shifter is broken, the lever broke off!!" I was looking for the non-existent thumb lever. And I often have to remind myself which one I am on to remember. I am 27.
Amanda
2011 Specialized Epic Comp 29er | Specialized Phenom | "Marie Laveau"
2007 Cannondale Synapse Carbon Road | Selle Italia Lady Gel Flow | "Miranda"
You don't have to be great to get started, but you do have to get started to be great. -Lee J. Colan